I have had Grover's for about 4 years. The first time it appeared I was covered on chest, back and legs. Went on a 2 week steroid which also made me crazy. This did send into remission I think. However, since then I have taken 1 allergy pill a day and a hydroxsine and this kept it at bay for a while. It seems to come back twice a year and usually I can calm it by taking Hydroxine. I had been taking vitamin d and fish oil for a long time. I stopped for some reason and then went to HOT YOGA! Big mistake. The virus came alive and have had a horrible time getting it to calm down.
I started taking 1000mg vitamin D, claritan, 2 Hydroxine's every 4 hours. Still would not go away. Started hibiclens and oat mill shower wash and then started laying out in the sun an hour a day. (light treatments gave me this idea) Before I wasn't sleeping hardly at all. Now its under control and seems to be going away. I also use cerave lotion twice a day. Hope this helps somebody!
I first noticed evidence of Grover's disease in 2011 with spreading lesions on my torso both back and front. Visits to dermatologists in London and New York including biopsies confirmed that the lesions were caused by Grover's Disease which I was told was incurable. However, I noticed that the symptoms were far less noticeable in the summer months and guessed that sunshine and therefore Vitamin D may be effective. In 2012, I started to take 4 x Vitamin D3 (Potency 10ug = 10 micrograms equivalent to 400 IU = 400 International Units) per day.
I immediately noticed an improvement to such an extent that after some months the symptoms and the scars had completely healed. I then experimented by coming off Vitamin D3 in the summer of 2012 but after some weeks the symptoms returned. I then stayed on Vitamin D3 for six or seven months over the winter of 2012/2013 and once again the symptoms disappeared following which I stopped taking Vitamin D3 for approximately eight months with no further symptoms. However, as I write this in February 2014 the symptoms have once again returned and I have therefore re-started the Vitamin D3 which once again has suppressed the symptoms.
The conclusion to my experience is that if not a cure, Vitamin D3 in the dose that I have used is a highly effective way of treating this unpleasant and irritating disease. I hope this works for you.