My husband got a really bad rash under his armpits from using old spice deodarant, what should he do? he used the deodarant stick and also the body spray and his rash resembles burns and is very sore and painful.

It : It is possible that this is a contact dermatitis due to allergy from a substance such as fragrance or preservative in the deodorant. I would avoid that deodorant and consider using a mild topical Hydrocortisone cream in the area. If not improved in a few days, consider visiting a dermatologist for diagnosis and to discuss treatment options and possible skin allergy testing. I hope that helps.