Pretty sure my little guy has this: Verrucas These are caused by a virus that infects the skin. They're similar to warts on hands. They can be difficult to spot and are often painless when small. They usually appear as areas of rough skin, sometimes with tiny black spots in them. Most often they're passed around where it's wet and people are walking barefoot, such as at swimming pools and in gym showers. They're easier to treat when small. Salicylic acid treatments from the pharmacist can work if they're caught early. Other treatments include: * Freezing with liquid nitrogen * Electrosurgery * Laser treatment * Surgical removal On his right foot, under the big toe, it's hardened skin with black spots. He's got 3 warts on his right hand. I can only assume it's from the hockey changeroom. It was all nasty and white at first, and I thought it was athletes foot, until the black spots showed up and I noticed the warts on his hand. What the site didn't tell me was the level of contagion. Do I scrub out the shower every time he showers? Anybody familiar with this?