Dermatoses in Pregnancy + Key Infectious Rash Patterns BETA TESTING
Quick pattern recognition + photo checklist + client-side “de-identify” tools to help structure a differential. This page is not diagnostic—use clinical judgment, labs (e.g., bile acids/LFTs when indicated), and dermatology / infectious-disease consult for uncertain or high-risk presentations.
Avoid uploading identifiable patient photos to consumer visual-search tools. Prefer HIPAA-compliant workflows (EMR media capture, secure eConsult/tele-derm, or contracted platforms).
If you must compare externally for education, de-identify (crop/blur), avoid unique backgrounds, and document consent per your policies.
Photo tools (preview → de-identify → compare)
Preview is local-only. De-ID tools are client-side; external links are optional.
Local preview + De-ID (client-side)
Use this before any upload. Exporting from canvas typically strips EXIF metadata.
Tip: include a scale marker (ruler/coin) and 2–3 views (close + mid + anatomic context).
The preview does not upload the image. If you export a de-identified copy below, it re-encodes the image. This helps remove embedded metadata but does not guarantee privacy.
De-identify helper (crop + pixelate)
1) Crop away identifiers → 2) Pixelate tattoos/face/jewelry → 3) Export and use the exported copy if needed.
External compare tools (optional)
Use clinical atlases first; visual-search second (education only).
“Search builder” (opens a text search in a new tab)
Use terms as a starting point; confirm with clinical context and appropriate testing.
Clinician mode: safer workflow suggestion
- Capture photos through your EMR / approved secure capture workflow.
- For suspected contagious exanthem, document exposure history and coordinate isolation/notification per local policy.
- If using a clinical atlas platform, confirm data handling (storage, retention, device processing vs cloud).
Pattern maps (pregnancy dermatoses + infectious rashes)
Simple distribution sketches to “pattern-match” quickly (not diagnostic).
Polymorphic eruption of pregnancy (PEP / PUPPP)
Often starts in abdominal striae (late pregnancy), classically spares the umbilicus.
Pemphigoid gestationis
Often periumbilical start → spreads; can blister. Consider biopsy/DIF when suspected.
Atopic eruption / Prurigo of pregnancy
Often earlier; papules commonly on extensor limbs ± trunk; eczema-like in some.
Measles (rubeola) — maculopapular exanthem
Classically begins on head/face and spreads downward to trunk and extremities.
Varicella (chickenpox) — vesicles in crops
Generalized pruritic rash progressing macules → papules → vesicles → crusts; lesions in different stages.
Shingles (herpes zoster) — dermatomal
Vesicular clusters in 1–2 adjacent dermatomes; often unilateral and usually does not cross midline.
Secondary syphilis — palms/soles pattern
Rash may involve palms and soles and is often rough/red/reddish-brown; usually not itchy.
Herpes simplex — grouped vesicles/ulcers
“Outbreak” lesions often present as blisters that break and leave painful sores (oral or genital).
Clinician mode: infectious rash reminders (non-exhaustive)
- Measles: consider airborne precautions and public health notification per local policy; pregnancy may be higher-risk for adverse outcomes.
- Varicella: confirm immunity/exposure history; coordinate isolation and management pathways per institutional protocol.
- Zoster: dermatomal vesicles/pain; confirm distribution and exposure considerations for non-immune contacts.
- Syphilis: palms/soles rash + systemic symptoms → test and treat per guidelines; pregnancy requires prompt management.
- HSV: localized painful vesicles/ulcers; pregnancy management varies by gestational age/history—use protocol.
This section is intentionally high-level—use your institutional pathways, local public health guidance, and ID/derm consultation.
Quick differential helper
Pick timing + morphology + distribution → suggests likely buckets.
Inputs
Output is a structured “thinking aid.” If systemic symptoms, blistering, mucosal involvement, or concern for infection/drug reaction → escalate and/or consult dermatology/infectious disease.
Suggested buckets
- Select inputs and click Generate suggestions.
Clinician mode: workup / management prompts
- Pruritus out of proportion to rash (esp palms/soles): consider ICP evaluation (bile acids + LFTs) per protocol.
- Periumbilical eruption ± blisters: consider pemphigoid gestationis; dermatology + biopsy with DIF often appropriate.
- Dermatomal unilateral vesicles/pain: consider zoster; confirm distribution and exposure precautions per policy.
- Face → downspread with fever/cough/conjunctivitis: consider measles; follow isolation/public health policy.
- Generalized vesicles in crops / mixed stages: consider varicella; follow institutional pathways.
- Palms/soles rash: broaden differential (incl. syphilis) and test per guidelines.
Reminders—not orders. Use local guidelines, allergies, comorbidities, and gestational age.
Suggested “photo set” for documentation
- One close-up (fills frame) + one mid-range + one anatomic-context photo
- Include scale marker (ruler/coin) when possible
- Consistent lighting; avoid flash glare
- Capture primary lesion before heavy excoriation if possible
EMR-ready note snippet (copy/paste)
Build a short, structured assessment/plan paragraph from your selections.
Patient education
Shareable photo checklist + “when to seek care” guidance.
Photo checklist handout
Use for patient portals / tele-derm style messaging when you request photos.
Suggested patient script (copy/paste)
When to seek urgent care
For potentially serious or contagious rashes.
Urgent signs
Contagious rash note
References & high-quality image libraries
Public, clinician-friendly starting points.
Pregnancy-specific dermatoses (overview)
Infectious rash: CDC clinical descriptions & images
Clinical atlas / decision support
Rash Photo Checklist (Patient Handout)
Please send 3 photos and a brief message. Good photos help us diagnose faster.
If you have fever, mouth sores, rapid blistering, or feel very ill, seek urgent evaluation.