Multiple things: Various conditions can cause itchy little bumps on those areas. It can be follicular eczema, an allergic or irritant contact dermatitis, urticaria, folliculitis, scabies, fungal infections, keratosis pilaris, among others. I would recommend having it evaluated and treated by a dermatologist.
Answered 5/2/2016
1.6k views
Possible herpes: "Itchy bumps" on the buttock may herald a herpes infection, but an examination will needed to diagnose this. Other possible causes include bacterial infection, fungal infection and atopic dermatitis.
Answered 5/11/2017
1.6k views
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