Even smoldering sand or asphalt can injure a child's tender soles, says Jacqueline Sutera, a podiatrist in New York City. If your child's feet get burned or blistered, first check them for pus, swelling, or bleeding. If you see any of these, a doctor should treat his feet.
If there are no signs of serious injury:
1. Wash your child's feet with gentle soap and water, or Epsom salts diluted in warm water.
2. If the blisters are closed, smooth on a thin layer of a burn cream like Silvadene twice daily, and bandage.
3. When the blisters open, put a triple-antibiotic cream and a Band-Aid on them twice daily for a few days.