hello, a week or two ago my left undrarn had started itching quiet a bit, later in the week i had what looked like a red bump small one, it started itching pretty regular, now i have a round knot about the size of a dime, if you scratch it it is very painfull, plus it is pretty sore i have to keep my arm up so it dont make it hurt, i have not used any deodrant at all except baby powder, seems to help a little, never had anything like this before, any suggestions,
Hello, Welcome to Chat Doctor, There are many things that could cause the skin to itch. Several types of inflammatory conditions of the skin, allergic reactions, and sometimes bacterial, viral or fungal infections can cause rashes on the skin of the arm pit. You have to undergo complete evaluation by a professional for proper diagnosis and treatment. The remedy would be related to the proper diagnosis. If you had a fungal infection causing your itchiness than an antifungal cream would be helpful. If you had an inflammatory dermatitis causing your itch, then a steroid cream may help. Thank you.