What conditions cause symptoms similar to an allergic reaction? I've been developing bumps about my body for the past three years. antihistamines relive these symptoms but they appear soon after. they are warm to the touch, irregular in shape, above the surface of the skin, itchy and have a slightly red coloration. They may sometimes be accompanied by abdominal cramps. a recent blood count was normal and showed that it is not an allergic reaction but the local doctors can't tell what is the cause. an outbreak can last for a day or two, sometimes for a week but the current outbreak had lasted for three weeks though i haves used antihistamines and a steroid. these bumps appear on my hands, palms, thighs, back, neck, face and abdomen. they can range from 2cm to 10inches in diameter.
Please help!!! what can possibly be the cause?