Pitted keratolysis is a bacterial skin infection that tends to occur in feet that sweat excessively. The infection is typically characterized by craterlike pits on the skin surface around the feet and toes in patches with it being more common on weight bearing areas. A foot odor is also a common accompanying problem.
Treatment is initially the use of topical antibiotics to deal with the infection. Next, the excessive sweating problem has to be addressed via good foot hygiene measures such as frequently changing socks and using powders to absorb the moisture.