Hello Doctor, My son Ronith is 5.5y and has developed blisters accompanied by itchiness on his left hand and near his left armpit. The blisters have been causing him discomfort and concern. We first noticed these symptoms a week ago. Since then, we have observed that the blisters are persistent and the itching has been causing discomfort. I would be grateful if you could offer your expert opinion on the possible causes of these symptoms.