Henoch-Schönlein purpura (HSP) rash

🌺Answer to Eagle’s Eye

🌺HSP rash, also known as Henoch-Schönlein purpura (HSP) rash, is the hallmark symptom of Henoch-Schönlein purpura, the most common vasculitis of childhood, characterised by leukocytoclastic vasculitis and immunoglobulin A deposition in small vessels of skin, loints, GI tract and kidney.

Key characteristics of an HSP rash:
Appearance: The rash starts as pink macules or wheals and develops into petechiae, purpura and larger ecchymoses, evolving in groups, typically lasting 3-10 days.

Location: The rash is usually symmetric occurring in gravity-dependent areas (lower extremities), extensor aspect of upper extremities or on pressure points (buttocks).

Palpable: The purpura is raised, usually palpable as small bumps under the skin.

Non-blanching: When a clear glass or plastic slide is pressed against the rash, it does not fade under pressure which is a key feature differentiating it from erythematous rashes.

Other system involvement: HSP can also cause arthritis/arthralgia (75%), Gastrointestinal affection(80%) and in some cases renal involvement (30%). In atleast 25% cases, rash appears after other manifestations.