02/18/2026
If you have any concerns about a rash you see on your child, don’t hesitate to ask your provider.
🩺 HSP (Henoch-Schönlein Purpura) / IgA Vasculitis
HSP is a condition that causes inflammation of small blood vessels, most commonly in children.
It often happens after a viral illness, like a cold or sore throat.
👶 Who gets it?
Most common in kids ages 2–10, but teens and adults can get it too.
🔍 Common symptoms:
✨ Purple/red rash (purpura), usually on legs or buttocks
🤕 Joint pain/swelling (knees/ankles)
😣 Belly pain (can be severe)
🤢 Nausea/vomiting
🩸 Blood in urine (kidney involvement)
🚨 When to worry:
Seek urgent care if there is:
Severe abdominal pain
Vomiting that won’t stop
Swelling of face or legs
Decreased urination
Dark/tea-colored urine
High fever or extreme fatigue
🩺 How is it diagnosed?
Often based on symptoms + exam, but may include:
Urine test (to check kidneys)
Bloodwork
Sometimes imaging if belly pain is severe
💊 Treatment:
Most cases improve on their own in 4–6 weeks
Supportive care includes:
Rest + hydration
Pain control (as recommended by provider)
Sometimes steroids if symptoms are severe
🧠 Important note:
Even after the rash improves, kidney monitoring is important for several months.
📌 If your child has this rash after an illness—don’t panic, but don’t ignore it either.
