How long have you been having this problem?
Do you have diabetes?
Do you sweat a lot?
Do you have any allergy
for foods or clothes?
I feel you are having Hidradenitis suppurativa
. This is a condition in which there are multiple abscesses that form under the armpits and often in the groin area. These areas are a result of local inflammation of the sweat glands. This form of skin infection
is difficult to treat with antibiotics alone and typically requires a surgical procedure to remove the involved sweat glands in order to stop the skin inflammation