How To Treat Grover's Disease Naturally?

HI, I WAS JUST DIAGNOSED WITH GROVER'S DISEASE A COUPLE WEEKS AGO. WAS MISDIAGNOSED AT FIRST, SO BEEN DEALING WITH THIS FOR 8 WKS. LAST WEEK MY STEROID ORAL AND CREAM WAS STOPPED AND I AM EXPERIENCING SOME RASH COMING BACK AND ITCHING AGAIN. I WOULD LIKE INFO ON NATURAL REMEDIES AND HOW MUCH TO TAKE AND FOR HOW LONG? I RESIDE IN AZ AND THE HOT WEATHER IS BEGINNING AND NEED TO GET THIS UNDER CONTROL. TOOK MY LIFE AWAY. i AM 46 YR OLD FEMALE, WEIGHT IS 190 AND 5 FOOT 7. I DON'T TAKE ANY DAILY MEDS, THANKFULLY, UNTIL THIS SITUATION EXCEPT FOR PRILOSEC. i AM HEARING THAT MERCURY LEVELS CAUSE THIS. THANKS