Hello my friend Thanks for your question on HCM You have to identify and treat the cause. Nonspecific aggravating factors should be minimised, such as overheating, stress, alcohol, caffeine and drugs likely to cause urticaria . The medicaments to treat acute urticaria are : 1.Loratadin and Cetirizin are both Antihistamines( Non-sedating H1 antihistamines )and are the mainstay of treatment. 2.Menthol 1% in aqueous cream or calamine lotion help to soothe itch, although the residue can cause itching in some patients 3.Oral steroids may help to shorten the duration of acute urticaria. 40 mg of prednisolone for three days is recommended for severe cases Talk to your doctor about this medicaments or if symptoms are not well controlled,If antihistamines are needed continuously to control symptoms for more than six weeks.,if urticaria is painful and persistent, suspect vasculitic urticaria. Hope this information is helpful to you Best regards