@gteach I was just diagnosed this summer. I’m 46 and no health issues/medications. Started with a patch between my breasts that may have been there for a while hat I attributed to sweat/irritation from heat and working out. Then we had a hot and humid few days in June, and I had a severe break out across my chest and upper abdomen. I thought I had shingles it was so painful and itchy. I tried every OTC I could find. I finally called the dermatologist. He diagnosed me with Grover’s. He treated me with mometasone furoate 0.1%. It cleared up in about 2 weeks! I do use gold bond spray around my bra area especially if I’m going to workout. I don’t know if it helps or not but it hasn’t come back. Good luck and hope it clears up fast!!