Welcome to Health Care Magic
There is a condition in that area called Hidradenitis suppurativa
– affecting the sweat glands or sebaceous glands there. / Or it may be a cyst, sinus
or lymph node/ an extension of breast tissue,called axillary tail...
Deodorants and perfumes could irritate...
Examination by general surgeon
will solve the issue – excision may be necessary...
Wishing speedy recovery