A rash recently developed on my sons legs 13 years old in an isolated pattern. The rash appears to be 2" above his knees and then down to just above his shoe line. The areas are red and appear to be taunt/tight. Their is no oozing or head to the bump, howver it does appear to be raised 1/8", circular in shape and mainly on the front and sides and very little on the back or calf area. I would describe it as appearing to be a lot of mosquito bites. He is an active athelete and plays baseball 2 - 4 times per week. Rash appeared 5/14 and seems to be getting a little worse.
Doctor has prescribed an allergy medication and a topical creme to apply to the areas. Bumps seem to be no respondent to warm baths, oatmeal baths, etc. We have had no changes in laundry detergents, deodarants or cleaning supplies in our home. No dietary changes in his diet and no symptoms on myself or my wife. Our home is extremely clean and well maintained. Our son has good hygiene practices and we cannot think of any logical explanation. He states that the bumps are not painful, itchy or discomforting. I can apply a great deal of pressure to them with little to no reaction from him. They are probaly covering 25 - 30% of the skin surface in the above described area. When we visited the doctor she seamed to think something contact related i.e. something in the grass, fertilizer, chemicals, etc. I have a chemical back ground and find this hard to believe, he has been exposed to lawn chemicals, fertilizers and grass at my office hundreds of times with no reaction.
These bumps are only found on the above described area, one unknown suspcion I have is that it may be a reaction to something based on the pattern. When playing baseball he wears sliding pants (similiar to spandex) that came down right where the bumps start, as if they couldnt get under the spandex. The bumps run down to his shoe line. Question... was whatever he encountered only able to cause this reaction in the unprotected areas between where the pants stopped and the shoes stopped. Seems odd that he wouldn't have bumps any where else on his body as a result of some type of exposure.
His general health and weight are good, although his appetite may be somewhat less since this rash has appeared. I also think he appears to be a little more fatigued. Description of bumps:
Red, patchy appear to be clustered in areas and isolated in others. Raised to the touch, no head or insect penetration mark. They are not itchy at all, concentrated mainly on the front and sides with very little on the back of the legs or thighs.
I look forward to your help and direction on this puzzling situation.