Hi. Thanks for posting your concern at HCM
Urticaria OR
hives can occur due to various causes like(to name a few) infections(bacterial , viral, fungal), drugs, certain foods, cold temerature, in response to strong emotions, exercise, pressure (prolonged standing, sitting), in
autoimmune disorders like SLE, RA etc. A few cases have no underlying cause and are known as idiopathic urticaria.
I would advice you to get few basic lab tests like Hemogram, stool for ova/cyst, Urine routine, Chest Xray.
An oral antihistamine like
cetrizine once or twice daily for a week would be suitable.
a topical soothing lotion like
calamine would help you symptomatically.
take care