Hmmm, I thought it was my lotion and deoderant reacting with the extra body heat and sweat because it was really unbearable at "creases" like my underarms and backs of my knees. Now I shower before I work out and don't put anything on my skin (out of consideration for others, I work out at home

) and haven't any more problems with being itchy (but DH is getting testy about the water bill).