Hi, It seems that you may be having urticaria. There may be some cause or no cause..i.e. idiopathic urticaria. You consult dermatologist for firm diagnosis and treatment. After thorough examination and investigations, he might come to some conclusion about the etiology of the urticaria. Treatment to remove the cause is important aspect in the treatment of urticaria. Fexofenadine or desloratidine may be taken for long time. If needed, steroids in tappering dose may be taken. Dietary factors like prawns,fish,nuts, cows milk,fermented food,yogurt,curd..etc might exacerbate the disease. Drugs,physical factors, enviormental factors..may be kept in mind. I hope you got my answer. Thanks. Dr.Ilyas Patel MD