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OverviewAetiologyPathophysiologyClinical features and red flagsInvestigationsDifferential diagnosisManagementComplicationsMonitoring and follow-upSpecial situationsCommon pitfallsQuestionsSources
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Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.

Safeguarding when skin findings raise concern

Dermatology · UK scope · Sources checked 27 Aug 2026 · Clinical review pending

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Immediate danger or serious injury

Airway compromise, shock, altered consciousness, severe burns, head or abdominal injury, poisoning, sepsis, strangulation signs, acute sexual assault, a child unsafe to leave, or an adult at immediate risk requires simultaneous emergency medical and safeguarding action.

Action: Stabilise first, obtain senior paediatric or emergency help, preserve necessary evidence without withholding care, contact the named safeguarding team and emergency services or social care according to risk, and do not discharge until an explicit safe plan and responsible professional are documented.

Overview

Recognise skin findings that merit safeguarding consideration, stabilise medical emergencies, document neutrally, distinguish important mimics, and use proportionate child and adult protection pathways without claiming that morphology proves causation.

Safeguarding is a clinical responsibility to notice, assess, share and act on possible abuse or neglect while continuing ordinary medical care. Start by addressing the presenting need and checking whether the child or adult can go home safely. Clarify who accompanied them, who holds parental responsibility or decision-making authority and whether private conversation is safe. Listen without accusation. A useful account records what happened, when, where, who was present, the person's developmental abilities, symptoms and delay, but an initial clinician should not conduct a detailed investigative interview.

Examine systematically after explanation, consent and assent. Document site, dimensions, shape, border, colour, tenderness, swelling, surface and healing, avoiding unsupported terms such as defensive injury or old bruise. Colour cannot reliably date a bruise. Look at the whole child when clinically justified, including scalp, ears, mouth, neck, trunk, limbs, palms and soles, while maintaining warmth and dignity. Examine genital or anal areas only when indicated and within the correct trained pathway. In richly pigmented skin, use good light, palpation and comparison to baseline and recognise that erythema and early bruising may be less visible.

Practice

Two practice questions

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DermatologyOriginal SBA

A bruise in a non-mobile infant

A 10-week-old who is not independently mobile is otherwise well but has a newly noticed 2 cm bruise on the upper arm. The caregiver is unsure how it occurred. What is the best response?

Choose one answer, then submit
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Sources and review status4 sources · checked 27 Aug 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Apply principles in context and verify current guidance when a decision affects care. Source check completed 27 Aug 2026; clinical approval remains outstanding.

  • NICE child maltreatment recognitionWhen to consider or suspect maltreatment, bruise and burn patterns, medical differential and response.
  • Working Together to Safeguard ChildrenCurrent statutory multi-agency assessment, information sharing, referral and professional responsibility in England.
  • RCPCH Child Protection EvidenceSystematic evidence on bruising, burns, oral injury, bites, fractures and differential interpretation.
  • GMC protecting children and young peopleConsent, confidentiality, information sharing, records and working with children and families.

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateComplete draftClinical stateAwaiting reviewJurisdictionUnited Kingdom

A differential diagnosis is an essential part of protection, not an excuse for inaction. Birthmarks may be mistaken for bruises; phytophotodermatitis can create linear or splash-shaped pigmentation; impetigo and insect bites can erode; vasculitis and coagulopathy can create purpura; connective-tissue disease increases bruising. Conversely, a medical diagnosis does not explain every separate injury. Discuss uncertainty early with the named safeguarding lead or senior paediatrician, follow the local multi-agency pathway and record who received the referral, what information was shared and who owns next steps.

Key points

  • A skin finding can raise concern but rarely establishes cause by itself; combine morphology with development, mechanism, timing, health history, behaviour and wider examination.
  • Any unexplained bruise in a baby who is not independently mobile is uncommon and needs prompt paediatric assessment, while concern is not the same as a concluded diagnosis of abuse.
  • Protected-site, patterned, clustered or unusually numerous bruises and an account inconsistent with the child's abilities increase concern and justify escalation.
  • Clearly demarcated immersion burns, patterned contact burns, cigarette-like burns or lesions of different ages are concerning, but accidental, cultural and medical mimics must be examined.
  • Congenital dermal melanocytosis, capillary and melanocytic birthmarks, phytophotodermatitis, bleeding disorders, vasculitis, infection and connective-tissue disease can resemble inflicted injury.
  • Lichen sclerosus, irritant dermatitis, constipation fissures, infections and acute genital ulcers can cause genital findings; no single lesion automatically proves or excludes sexual harm.
  • Treat pain, infection, bleeding and other urgent illness at once; safeguarding assessment and necessary healthcare proceed together.
  • Use open prompts, record spontaneous words verbatim and avoid leading questions, repeated interviews or asking the child to demonstrate the event.

Aetiology

01

Accidental injury

Developmentally plausible falls, collisions, sport, equipment and treatment can injure exposed surfaces with a coherent mechanism and time course.

02

Inflicted injury or neglect

Physical, sexual or emotional harm and unmet health, hygiene, nutritional or supervisory needs can produce skin findings and wider behavioural or developmental signals.

03

Medical mimic

Birthmarks, bleeding disorders, vasculitis, infection, photosensitive reactions, connective-tissue fragility and inflammatory dermatoses can resemble inflicted or accidental trauma.

04

Cultural or self-inflicted practice

Cupping, coining, massage, ritual applications, self-harm and skin picking create patterned lesions whose context and safety implications require sensitive enquiry.

Pathophysiology

  1. 1
    Blunt vascular injury

    Compression or shear ruptures dermal and subcutaneous vessels, allowing blood to spread through tissue and produce swelling, tenderness and evolving colour.

  2. 2
    Thermal tissue damage

    Heat denatures proteins and injures vessels to a depth determined by temperature, contact duration, medium and skin thickness.

  3. 3
    Chemical or phototoxic injury

    Irritants directly disrupt barrier, while plant furocoumarins plus ultraviolet exposure create delayed linear or splash-shaped inflammation and pigmentation.

  4. 4
    Haemostatic failure

    Platelet, coagulation-factor, vascular or connective-tissue abnormalities permit bleeding after minimal force or spontaneously and may create petechiae, ecchymoses or haematomas.

  5. 5
    Inflammatory vessel injury

    Immune inflammation and infection damage small vessels, allowing red cells into skin and creating palpable or non-palpable purpura that can mimic bruising.

Clinical features and red flags

Developmentally unexpected bruising

Any bruise in a non-mobile infant or injury whose mechanism exceeds the child's observed motor abilities warrants prompt paediatric and safeguarding assessment.

Concerning bruise distribution

Clusters, repeated shapes and bruising on ears, neck, cheeks, trunk, buttocks, genital region or other protected surfaces raise concern, especially with no coherent account.

Patterned skin injury

A loop, implement outline, fingertip cluster, bite-like arc or contact-object shape can preserve aspects of mechanism but still needs expert interpretation and differential diagnosis.

Concerning thermal injury

Uniform depth, sharp water lines, symmetrical stocking or glove distribution, spared flexural creases or a distinct object pattern is concerning for forced immersion or contact.

Neglect-related skin disease

Severe untreated infestation, infected eczema, pressure injury, urine or faecal maceration and cold or sun injury may reflect unmet care needs but also require assessment of access and caregiver capacity.

Genital and perianal finding

Fissures, erythema, purpura, warts, discharge or ulcers require a medical differential, confidential history and proportionate specialist pathway rather than automatic attribution.

Immediate safety signalRed flag

A direct disclosure, threatening accompanying person, strangulation symptom, unsafe home plan or serious associated injury requires action even if the skin finding itself is non-specific.

Red flags requiring action

Investigations

  1. 01
    Head-to-toe clinical assessmentFirst step
    Why
    Treat illness and identify the full injury and medical-differential pattern.
    Interpretation and limitations
    Record observations, growth, development, hydration and every relevant skin and mucosal finding on a body map; absence of visible injury does not invalidate a disclosure.
  2. 02
    Forensic-quality clinical documentation
    Why
    Create an accurate contemporaneous record for care, comparison and possible legal use.
    Interpretation and limitations
    Use measurements, anatomical landmarks, neutral description, verbatim spontaneous words, time, people present and clinician identity; do not estimate bruise age from colour.
  3. 03
    Clinical photography
    Why
    Preserve objective appearance when images are necessary and permitted.
    Interpretation and limitations
    Obtain consent or use the lawful safeguarding basis, explain purpose, include colour scale and ruler, take overview and close views and store through the approved secure system with access record.
  4. 04
    Haematology assessment
    Why
    Investigate an inherited or acquired bleeding tendency without allowing tests to delay protection.
    Interpretation and limitations
    Select FBC and film, PT, APTT, fibrinogen and factor or von-Willebrand testing with paediatric haematology according to history; normal screening tests

Differential diagnosis

01

Congenital pigment or vessel mark

Dermal melanocytosis and vascular or melanocytic birthmarks persist in a stable distribution and may be documented in newborn records.

02

Bleeding or connective-tissue disorder

Mucosal bleeding, family history, disproportionate haematoma, joint laxity or poor wound healing supports targeted haematology or genetics review.

03

Vasculitis or infection

Palpable dependent purpura, fever, systemic symptoms, vesicles, crust or culture findings redirect assessment while safeguarding context remains open.

04

Phototoxic or contact reaction

Linear drip and handprint-like pigmentation after plant and sun exposure or sharply exposure-linked eczema can resemble inflicted shapes.

05

Genital inflammatory disease

Lichen sclerosus, irritant dermatitis, constipation fissures, infection and acute genital aphthosis can cause purpura, erosion, pain or bleeding.

Management

01First-line responseTreat, listen, document and escalateFirst stepFirst lineEscalationA skin finding or account creates reasonable safeguarding concern without an immediate resuscitation emergency.+
  1. 1Treat pain and illness, speak with the child or adult safely, use open prompts and record spontaneous words verbatim without seeking a detailed investigative narrative.
  2. 2Perform the minimum necessary systematic examination with consent, assent and a chaperone and document objective measurements and a medical differential.
  3. 3Discuss promptly with the named safeguarding professional and make the appropriate social-care or police referral according to local thresholds, recording the safe disposition and owner.
02Non-mobile infant routeEscalate unexplained bruising promptlyEscalationA baby who is not independently mobile has any bruise or a bruise-like lesion.+

Complications

01

Unrecognised serious injury

Focusing on skin alone can miss intracranial, abdominal, skeletal, strangulation or sexual injury and ongoing immediate danger.

02

Ongoing abuse or neglect

Failure to share and act can leave a child or vulnerable adult exposed to escalating harm or fatal injury.

03

False attribution

Claiming abuse from a non-specific lesion can damage trust and family life, while premature medical reassurance can also leave risk unaddressed.

04

Evidence and care disruption

Leading questions, inaccurate notes, insecure images, fragmented referrals and repeated examinations can impair both healthcare and later investigation.

05

Psychological trauma

The original event and an insensitive, disbelieving or unnecessarily invasive clinical response can each create lasting fear and avoidance of care.

Monitoring and follow-up

  • Before discharge confirm medical stability, a safe destination, transport, who knows the plan and the named professional responsible for each referral, result and follow-up examination.
  • Re-examine evolving injury only when clinically or evidentially necessary and, where possible, use one trained team to minimise repeated exposure and distress.
  • Track wound, burn, infection and pain recovery alongside protection actions; a safeguarding referral never substitutes for ordinary clinical follow-up.
  • Review laboratory, imaging, photographic and pathology results in a multidisciplinary context and communicate material changes promptly to the relevant protection team.
  • Record when a proposed medical mimic is confirmed, excluded or incomplete and update language and agencies rather than leaving an outdated allegation or reassurance uncorrected.
  • Check the child or adult understands who can be contacted, what confidentiality means and how to seek urgent help if danger, symptoms or coercion recur.
  • Use supervision or case review after complex decisions and recognise clinician distress without allowing team anxiety to produce accusatory language or diagnostic closure.

Special situations

Concern is a threshold, not a verdict

Escalation means the finding deserves expert multidisciplinary assessment; it does not declare that a mechanism or perpetrator has been proved.

Development calibrates plausibility

The same bruise has different significance in a non-mobile infant, a newly cruising toddler and an independently active school-age child.

Colour cannot date bruising

Bruise colour evolves variably with depth, site, lighting and skin tone, so precise age estimates from appearance are unreliable.

A mimic may be only part of the answer

A birthmark or coagulopathy can explain one pattern without explaining a separate fracture, disclosure or unsafe caregiving context.

Care precedes evidence perfection

Analgesia, antibiotics, burn treatment and resuscitation should not be withheld to preserve an ideal sample, although early specialist advice can protect both goals.

Words become clinical evidence

Verbatim spontaneous language and neutral morphology preserve accuracy better than interpretation-heavy notes or repeated prompted accounts.

No visible mark does not mean no harm

Strangulation, sexual assault, coercive control and neglect may leave absent or transient skin findings, so history and safety remain central.

Common pitfalls

  1. 01

    Writing non-accidental injury as a proven diagnosis when the evidence supports concern and assessment rather than certainty.

  2. 02

    Reassuring about any bruise in a non-mobile infant without same-day senior paediatric assessment.

  3. 03

    Dating a bruise precisely from colour or overlooking subtle swelling and tenderness in richly pigmented skin.

  4. 04

    Using repeated leading questions or asking a child to reproduce an alleged event.

  5. 05

    Photographing intimate or identifying areas on a personal device or without a lawful purpose and secure record.

  6. 06

    Assuming genital dermatitis, lichen sclerosus, warts or an ulcer proves sexual abuse, or assuming a medical diagnosis excludes a separate disclosure.

  7. 07

    Ordering a token coagulation screen and treating normal results as proof that bruising was inflicted.

  8. 08

    Making a referral without confirming immediate safety, responsible recipient and follow-up ownership.

  9. 09

    Sharing an adult's plan in a way that an abusive person can access without considering coercion and digital safety.

Explain examination and photography, obtain consent and age-appropriate assent, use a chaperone and expose only what is necessary; clinical images need a scale, label and secure storage.
  • Share relevant information with the right professionals when necessary for protection, record the legal and clinical reasoning and never promise absolute secrecy.
    • Bruising in a non-mobile infant, patterned or clustered injury, burns with clear demarcation or immersion distribution, injury to protected sites, multiple injuries of different apparent ages, an implausible or changing account, delay in seeking care, disclosure, coercive behaviour, unsafe discharge or serious medical symptoms warrants prompt senior safeguarding assessment.
    do not
    exclude every disorder or inflicted injury.
  • 05
    Imaging and occult-injury pathway
    Why
    Detect fractures, head injury or internal trauma that may be clinically silent.
    Interpretation and limitations
    A specialist paediatric team chooses skeletal survey, neuroimaging, abdominal tests and ophthalmology by age and presentation; use the formal protocol and arrange required follow-up images.
  • 06
    Dermatology testing for mimics
    Why
    Confirm vasculitis, infection, photosensitive reaction, birthmark or inflammatory disease when morphology supports it.
    Interpretation and limitations
    Use dermoscopy, culture, coagulation tests or biopsy selectively and compare early-life records; a diagnosed mimic can coexist with a separate safeguarding concern.
  • 07
    Specialist sexual-health or forensic testing
    Why
    Provide clinically and evidentially appropriate care after possible sexual harm.
    Interpretation and limitations
    Use the regional paediatric or adult sexual-assault pathway for consent, chain requirements, pregnancy prevention, STI sampling and prophylaxis; avoid duplicate low-quality samples and examinations.
    • 1
    Arrange same-day senior paediatric assessment, confirm developmental ability and examine for medical instability, other injury, birthmarks and bleeding symptoms.
  • 2Obtain an exact account without confrontation and check maternity, health-visitor and prior clinical records for documented congenital marks or previous concern.
  • 3Follow the local occult-injury and safeguarding pathway, including haematology or imaging selected by paediatrics, while avoiding a statement that bruising alone proves abuse.
    • 03Mimic-aware routeTest plausible medicine without closing protectionA birthmark, bleeding disorder, vasculitis, dermatitis, infection or cultural practice could explain the appearance.+
    1. 1Compare morphology, symptoms, time course and distribution with the proposed diagnosis and obtain targeted dermatology, paediatric or haematology input.
    2. 2Document which findings the medical explanation accounts for and which remain discordant; do not require a family to prove innocence through indiscriminate testing.
    3. 3Continue the safeguarding pathway when the wider history or other injury remains concerning, and revise transparently when new evidence lowers or raises risk.
    04Confidentiality and sharingShare enough with the right peopleProtection requires information exchange beyond the immediate clinical team.+
    1. 1Explain intended sharing when safe, but do not seek consent from a person whose refusal would leave a child or adult at serious risk.
    2. 2Share relevant, accurate and proportionate information through secure channels, identifying fact, reported account and professional opinion separately.
    3. 3Record the recipient, time, legal or professional basis, information provided and agreed action and follow up if the receiving service does not respond as expected.