Pseudomonas is a species of bacteria that can infect human tissue, and can be the cause of many serious infections throughout the body. These infections can occur in the feet, and are often seen in the wounds of those with poor immune systems or those with diabetes. However, healthy people can also become infected with pseudomonas, particularly in the areas around the toe web skin and toe nails.

Pseudomonas can come from many different sources, but one of the most common sources is from exposure to water with limited circulation, such as in a hot tub or pool. This bacteria can often invade the moistened areas between the toes in this environment, and can also attack nail tissue and the skin underneath it. The skin infection is generally minor, but in certain circumstances can become more serious if open sores are present. Pseudomonas bacteria can usually be identified by the bright green color they impart to tissue that is infected, or by a sweet odor. Of course, these findings are not always present in every pseudomonas skin infection, but when they are they can be particularly telling.

Treatment of minor cases can be accomplished with soaking in an acetic acid solution, which will kill the bacteria over time. Moistened tissue between the toes may also need to be reduced, to decrease the bacterial source. More significant infections will need specialty antibiotics, as pseudomonas is resistant to some of the more basic antibiotics available. This can be accomplished using oral antibiotic pills if the bacteria species is not highly resistant, although intravenous antibiotics may need to be used in serious infections of resistant pseudomonas.