Symptoms vary from patient to patient. Itching is the most common symptom and may be severe and uncontrollable. When the child itches a particular area of the skin, the surrounding skin reacts to light touch by itching (this phenomenon is called allokinesis). Scratching the skin causes the inflammation to increase and makes the rash worse, leading to more inflammation and itching. This is called the itch-scratch cycle. The child often scratches till the skin bleeds. The itching may be so…