Hi. Thanks for posting your concern at HCM I would keep a possibility of Urticaria, though i would have liked to have more information on the rashes as whether they are evanescent or persist for more than 24 hours. Urticaria OR hives can occur due to various causes like(to name a few): --Infections(bacterial , viral, fungal) --Drugs --Certain foods and food additives/preservatives --Physical Urticaria: Cold temperature, Heat, Pressure(Prolonged Standing, Sitting), Dermaographism etc. --Cholinergic Urticaria: in response to strong emotions, exercise, spicy food etc --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 Fexofenadine OR Loratadine once or twice daily for a week would be suitable. They are non-sedating and wont affect your alertness level. A topical soothing lotion like calamine would help you symptomatically. take care regards