I came down with Grover's disease years ago and was told there is no cure. I tried cortisone creams which did not work. It was unbearable. I was reading a forum about it one day & found that 2 women went on a gluten free diet and it went away for them so I went gluten free and it went away. I have had 2 flare ups over the years & both were after eating licorice which often has gluten in it. The Grovers began to fade as soon as I stopped eating the licorice. So it may be gluten for some people and it's worth a try.
I have had Grover's since I was a teenager, but never knew what it was. I am 56 now. My Dermatologist confirmed it a couple of years ago. She suggested using the cream AmLactin which helped, but it was always there. I noticed when I started having fruit smoothies 5 days a week, my skin improved. A couple of months ago I decided to go on a no wheat diet in hopes of helping with inflammation problems. I have fibromyalgia and osteoarthritis and have a lot of pain and stiffness. Well, my pain and stiffness is 60 percent better and the grovers disease seems to be gone for the first time in my life! Oh, and I lost about 7 pounds and feel better than I have in a long time. If I cheat and eat wheat, I am in pain for a couple of days. It is definitely worth a try!