<s>[INST] My daughter is complaining of a burning pain under her arms. There appears to be a red rash under both arms. Benadryl just given by mouth. Wondering what could be the cuase. She says that she isnt using a different deoderant or sap or perfume. I havent switched clothing detergent. She is active in sports. There are no raised bumps [/INST] Benadryl is unlikely to be the cause. It is more likely to be a fungal infection. Apply candid (clotrimazole) powder and things will gradually improve. Avoid application of soap but wash with water. </s>