Hi
Welcome to the forum!
Well if you have stopped the use of deodorant then in all probability the rash is not due to the deodorant. The commonest causes are cczema, dermatitis including sweat dermatitis, and fungal infection like Tinea cruris. Keep the area dry, wear loose fitting clothes, and change undergarments at least twice a day. Many treatment options are there like Clotrimazole 1%, Miconazole nitrate 2%, Tolnaftate 1% and Butenafine hydrochloride 1%. Many OTC products containing these salts are available, your pharmacist can help. Try a combination of two and apply until the rash you see disappear. Continue application for 2 weeks after the rash disappears. Wash your hands well and dry them properly both before and after the application.
Hope these tips help. If symptoms persist consult a skin specialist. Please let me know if there is any thing else and do keep me posted. Take care!
I'm not really sure, but I can't use any deoderant with aluminum in it (which is almost every deoderant) because I get a really, really gross itchy rash. It will get infected and spread. I use this deoderant called "Tom's Natural Deoderant". It is aluminum free and you can get it at most general drug stores.