<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have smale bumps that itch in the crease of my arm where it bends... I notice it bothers me more when it gets hot and gets worst at night... But this summer I have been exposed to the sun and heat more then usual ... And it started on my left arm now it s staying on my right arm . could be a heat rash or eczema ?  <response>: Hi, It may be atomic dermatitis. Kindly consult the dermatologist for the perfect diagnosis and proper treatment. Antihistaminics like desloratidine 5 mg twice a day, steroid in the tapering dose for few weeks and application of tacrolimus point 0.03 might improve the condition. Avoid contact with suspected allergens. Avoid eggs, fish,prawns, cashew nut, peas,soda, fermented food in diet. Avoid soap during bath. Keep the mind cool. I hope this might help you. Thanks. Chat Doctor. 