I can understand your concern for itchy red bumps on butt and private parts. There can be multiple possibilities of the itchy red bumps on butt and private parts and it requires a close physical examination to diagnose the exact entity of the problem.
In my view correlating with the facts you have provided it appears to be fungal infection
of the area.
I suggest you to meet a dermatologist
to for proper therapy. In between you should wash the area properly. If I were your dermatologist then presumptively would have preferred to apply an antifungal cream such as clotrimazole
. You can take an antihistamine such as loratadine
for once a day if itching is present.
Do not try to pinch, pop or squeeze the area as it may cause secondary infection of the area.
All the best