my son has a itchy blistery rash that appears everyday and goes away every night after applying caladryl and taking benedryl

	Asked by Unregistered (Male; 10; when he was 2 he dehydrated and have a fever of 105.? . That is the only thing he has ever had, he has not had any ear infections he is a healthy child; Relevant drugs:taking benedryl at this present time for the itchy rash. ) on Wed 23, Jul 2008 12:30pm
	My 10 year old started breaking out 4 weeks ago about 1x a week. A friend of mine is a doctor, ( not my childs dr ) and he called it contact dermatitis. I had put solarcane on a sunburn. Since then it is now worse it is almost daily. I have not changed detergent, soap, or shampoo. It was only after being outside for more than 4 hours now it is even if he does not go out. It looks kind of like blisters and if I do not give him benedryl or put caladryl lotion on it soon after it appears it connects together and makes whelps and they itch. It is normally gone when he gets up the next moring but then returns that afternoon. Should I have him tested for allergies or just keep giving him benedryl or clartin otc?
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	Answer by Dr Simran, MD (doctor) on Wed 23, Jul 2008 12:40pm: Hello Dear, It probably seems that your son has urticaria that produces skin lesions and intense itching. If the lesions are rubbed, hives may form on the site Rubbing of a lesion produces a rapid wheal (a hive-like bump). Younger children may develop a fluid-filled blister over a lesion if it is scratched The symptoms include appearance of brownish lesions on skin ,welt or hive formation when lesions are rubbed or scratched ,blister formation over lesion when it is rubbed ,f acial flushing You should go in for tests like Urine histamine which shows elevated levels of histamine Skin biopsy -- confirms the presence of increased number of mast cells . You should consult a dermatologist for confirmed diagnosis. Refer http://www.nlm.nih.gov/medlineplus/ency/article/001466.htm for more information. Best
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