What Each Rash Looks Like Up Close
Placeholder: lesion shape and stage differ across the three diseases.
- Vesicle: Chickenpox (Dewdrop-on-rose-petal look)
- Oval blister: HFMD (Grey vesicle, red halo)
- Macule: Roseola (Flat, blanching, rose-pink)
- Polymorphism: Key clue (Chickenpox shows all stages at once)
Lesion morphology placeholder
Placeholder text describing vesicle, pustule, and macule differences briefly.
Where the Rash Shows Up on the Body
Placeholder: distribution site is a fast visual differentiator.
- Centripetal: Chickenpox (Trunk-heavy, spreads outward)
- Acral + oral: HFMD (Palms, soles, mouth)
- Truncal: Roseola (Trunk and neck, spares face)
- Palms/soles: Key clue (Distinctive for HFMD only)
Distribution mapping placeholder
Placeholder text about mapping rash density across body regions.
When the Rash Appears Relative to Fever
Placeholder: timing sequence narrows the diagnosis quickly.
- Day 0–2: Chickenpox (Fever and rash concurrent)
- Day 1–3: HFMD (Mild fever, then rash)
- Day 3–5: Roseola (Rash follows fever break)
- Defervescence: Key clue (Roseola rash starts as fever drops)
Timeline correlation placeholder
Placeholder text explaining fever curve versus rash onset timing.
Symptoms That Travel With Each Rash
Placeholder: accompanying signs help confirm the diagnosis.
- Pruritus: Chickenpox (Intense itching, malaise)
- Oral ulcers: HFMD (Sore throat, poor feeding)
- High fever: Roseola (Irritability, febrile seizure risk)
- Itch vs pain: Key clue (Chickenpox itches, HFMD hurts)
Symptom cluster placeholder
Placeholder text summarizing companion symptoms per disease.
Putting the Clues Together
Placeholder: combine appearance, site, and timing for a call.
- Vesicle + trunk: Chickenpox call (All stages present)
- Hand/foot/mouth: HFMD call (Oral ulcers plus acral rash)
- Post-fever rash: Roseola call (Well-appearing child)
- ~85%: Overall accuracy (Placeholder composite confidence)
Differential summary placeholder
Placeholder text tying the three-disease comparison together.
Placeholder key insight: combine rash shape, site, and fever timing.