hi Seems like your grandson has developed Impetigo contagiosa Impetigo is a bacterial skin infection. It is caused by Staphylococcus aureus or Streptococcus. It s generally seen in children, although it can occur in adults. The typical honeycomb is usually seen, which is a yellow, sticky type of crusting, which is its cardinal symptom. It can be painful, though one doesn t usually have a fever. This type of skin infection can affect any part of the body, including the face. It is considered to be highly contagious and spreads by scratching from one bodypart to another. It is an infection of the top layers of skin. In kindergardens or among siblings it may spread from person to person Impetigo can be treated with oral or topical administration of antibiotics( like topical mupitocin cream). It may even sometimes resolve spontanously without treatment. Hope it helps Dr Geetika Paul