<s>[INST] My 7 yr old son has had a bumpy rash on the back of his knee. It s been there for about 6 months. It doesn t bother him much. Sometimes it flares up and is itchy and gets more bumps then goes back down. But always has these bumps. Tried cortisone cream and Benadryl cream. I m puzzled [/INST] I think u have to show ur child yo skin specialist for rash For itching give her Allegra syrup 5ml which decrease itching </s>