My son has several unexplained sores, bump type in his head. This is not the first time they have appeared....Normally he is treated with Bactraban.......But no explanation as to what it is......Help! Also, he is 4 years old and this has happened on his legs,arms and neck in the past.
Hi...by what you quote I feel that your son is having recurrent pyoderma or impetigo. Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically.  Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health.