There may be acne vulgaris
Apply clindamycine gel at night daily till you get benefit.
Avoid oily food and milk.
Cleanse the face with antiseptics.
Avoid to squeez the lesion.
On bikini area, you may be having follicultis.
It may be due to friction or pressure.
Apply antibiotic cream.
Take oral antibiotics
like doxycycline or minocycline
for 2 to 4 weeks.
You might be alright.
If you do not get proper response, consult nearby dermatologist
Dr. Ilyas Patel MD