I saw on the internet as peppermint had positive effects on post shingles. I tried the morning on the head right side spray shot, then a spray bottle of water shot all with a good brushing. As I carbide cortisone, very difficult to eliminate the adverse effects of this position shingles. Miracle quiet for the day. I saw my doctor who follows me to the university hospital, I have spoken to him, once she V'a inquire. Be careful to avoid if possible to put the evening as peppermint would tend to make you sleep well. After much hassle and avoid taking medication, so the essential oil "peppermint" is very effective for me