[YEA] I have suffered with Lichen planus since I was 10 years old. I once had a severe outbreak that lasted almost 4 years. This included oral lesions and lesions on my legs, feet, ankles, arms, back, neck, scalp, and vaginal lesions. After unsuccessful topical cortisone treatment, the doctor placed me on prednisone. Because prednisone depletes Vitamin D stores, I was told to take a very large amount of Vitamin D supplements. I started the prednisone, but did not start the Vitamin D supplements for a couple weeks. I noticed a drastic improvement in my lichen planus. They began to shrink in size, and the itch began to fade. However, once I started my vitamin D supplement, I flared back up. Thats when I put 2 and 2 together. I told my doctor, and he dismissed it. I would not take his word for fact though since I was also told that lichen planus is not genetic...my father and his sister both suffer with lichen planus. I followed my gut and cut vitamin D completely out of my diet for a while. milk, eggs, fortified cereals, fish, less sunlight, etc. My lichen planus went away. My father did the diet with me, and his went away as well. Once they went away, I took, I ate normal again, and whenever I notice old scars turning pink and starting to itch, I watch my Vitamin D for a couple of weeks. I recently had another outbreak, and I think it is due to the fact that I have had 2 back to back pregnancies and have been on prenatal vitamins for 2 years, which have a significant amount of vitamin D. I think its finally caught up with me, so I started the diet that I did ten years ago once again, I have already noticed I am getting better. My father is currently getting another outbreak because he was supplementing his diet with Fish Oil, which has large amounts of vitamin D. Since he has cut it out of his diet again, he is also improving.