After eating shrimps, a 25-year-old man suddenly developed skin itching, some areas of his skin became hyperemic or erupted into vesicles. Make the diagnosis:

Answer options

1. Scabies
2. Hemorrhagic vasculitis (Henoch-Schonlein purpura)
3. Psoriasis
4. Urticaria pigmentosa
5. Acute urticaria

Explanation

After eating shrimps, a 25-year-old man suddenly developed skin itching, some areas of his skin became hyperemic or erupted into vesicles. Make the diagnosis:Psoriasis → No relevant history & not suddenAcute urticaria → Sudden Scabies →Itching in palms & not suddenHemorrhagic vasculitis (Henoch-Schonlein purpura) → not suddenUrticaria pigmentosa (also known as the generalized eruption of cutaneous macrocytosis (childhood type)) is the most generic form of cutaneous macrocytosis. It is a rare disease caused by excessive numbers of mast cells in the skin that produce hives or lesions on the skin when irritated.