My 3 year old daughter regularly takes singular and benedryl for her allergies. Rescently she has been taking augmenten for an upper respiratory infection. Last night all of a sudden these long whip like marks appeared all over her body. She has been taking the antibiotics for the last ten days. All medications I've mentioned she's taken before and never had an allergic reaction. The only thing my husband and I can pinpointt that she ate that was different was a chocolate waffer like bar with peanuts. She has no known allergies to any foods or medicines. We gave her benedryl and placed cold towels on the areas last night and they seem to have went away. About an hour ago today we noticed the same marks appear again in different places. We have not changed the soap we bathed her with, no new detergent, nor lotion. What could this be?