Apply mycitracin ointment 2-3 times a day. Keep armpit clean and dry and wash thoroughly with Dettol soap.
Take augment 625mg three times a day for 7,10, or 14 days till pus dries up. Take tablet brufen 400mg twice a day for pain for a week. If things don't improve consult a skin specialist.
For further help, we advise booking an appointment with the best dermatologists in Lahore and seek a piece of in-person advice at https://oladoc.com/pakistan/lahore/dermatologist
You can seek further professional help from the below recommended Specialists: