Can anyone help me?

I have been suffering from Urticaria for the past 6 to 7 months and one of my friends told me this disease name after hearing the symptoms. I am suffering from the itchy rashes almost on all parts of the body, severely on hands and legs. In the initial stages these rashes are not itchy but after a few days the itching becomes severe. Sometimes swelling of the lips also occurs. Most of the time these rashes starts in the evening and they starts disappearing after some hours. I am a pure vegetarian and I don’t have habits like smoking and drinking. Whenever these rashes started I used to take Avil or Cetrizine (anti allergy pills). I am really bothered about my situation. Once I have taken English medicine, but that was of no use. After few days, I went to a Homeopathic clinic after I started using the medicine I never faced the problem for the next two months. But after a few days they started again and with full intensity. I am continuing the same medicines but they are not showing any effect. Let me know whether this disease is curable or not. I will be grateful for your suggestion. Thanks!