Hi. Welcome To HealthcarMagic Regards, Dr. Jagdish
Hives called Urticaria
are mostly from autoimmune process. Many of the times they have no reasons. Heat, cold, stress, fever, and some kind of allergic material and foods aggravate the hives. Identify the risk factors and avoid exposure them. But when they come the treatment is Oral steroids
, antihistamines like Ceterizine/ Benadryl
and local application of calamine
Also get the ANA , RF,TSH, CBC and Differential count to look for Eosinophils in the blood which indicates allergic process.