Try no deodorant and Dove soap for a while.
Hello,
This can be due to yeast skin infection. The other possibility would be intertrigo. Most cases respond to over-the-counter products, which contain any of several basic ingredients: miconazole, tolnaftate, terbinafine,ketaconazole and clotrimazole.You can consult a pharmacist and get any cream or lotion containing these ingredients.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
This used to happen to me a lot. The only deodorants I can use are the roll ons or gels. Something in solid deodorants cause my skin to peel and itch under my arms To help with the rash try A&D ointment and/or hydrocortisone cream.