Hi,
Recurring rash over the body with red bumps and itching can be most probably due to
allergic reaction. There can be a number of allergens like any food or medication, soaps, detergents, leather, latex, poison ivy etc. For confirmation of the cause you should consult an Allergist and get evaluated and a thorough clinical evaluation and investigations like allergic tests like
Patch test, RAST test, food challenge test etc can help in diagnosis and treatment can be done accordingly.
As of now you can take anti-allergics like Levocetrizine, Allegra to control the itching spread of rash. Do cool compresses. Application of calamine lotion or
Caladryl lotion can help in soothing the skin.
Topical steroid ointments can be applied but for a short duration, like for a week to 10 days and then discontinued or can be continued only under expert supervision. In extreme cases a Steroid injection can help in faster relief.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician