I have had very irritated, VERY red, and itchy under arms this week, and it sometimes feels as if there is sweat on the underarm, but I am not sweating. I used to have it last month, but it went away for about 2 weeks and came back again. I put talcum powder on it yesterday, and it was really dry and painful. I am using Eucerin moisturizer and redness relief cream. I don t know if I will get good results. I am wondering what is this? Is it a underarm rash, allergy, or am I using the wrong deodorant? (If I am using the wrong deodorant, what is a good deodorant to use?)