I suffered for two years with hives for no reason. I went to allergy doctors, dermatologist, etc. Finally my gynecologist asked do you want the hives to go away. She said get five accupuncture treatments and it should start going away. I thought she was nuts, but I tried it. After my third visit my hives were about 75% better. I just went two months without getting hives at all. So for anyone who is suffering and having to take antihistimines, there is a better way. I know it sounds crazy, but it worked. The accupuncturist said they believe that hives are caused from excessive heat