Urticaria.Try cyproheptaidine 1 tab at bed time.You will feel sedated and hungry but the itch and rash will disappear in a week.
The symptoms are suggestive of hives. Hives (medically known as urticaria) are red, itchy, raised areas of skin that appear in varying shapes and sizes. They have a tendency to change size rapidly and to move around, disappearing in one place and reappearing in other places, often in a matter of hours.
Take non sedating antihistamines like Claritin or Zyrtec to get symptom relief. Sedating antihistamine such as Benadryl is used at night to get urticaria control. Short courses of oral cortisone or steroids are taken for short periods (one to three days) to settle more severe symptoms.Also apply calamine on the rashes.
You may take Vitamin C along with the prescribed treatment. Vitamin C is a general anti-allergy supplement. It helps stabilize mast cells so they are less likely to release histamine.
If the symptoms persist, then you can consult an immunologist. He may start with immunosuppressive drugs.
If the hives don’t go after 6 wks of treatment also, then it can be a case of chronic urticaria which needs further evaluation as it may be due to auto antibodies.
I hope it helps. Take care and pls do keep me posted on how you are doing or if you have any additional doubts. Kind regards.