If you cannot cut your toenails or you have a foot problem, ask your doctor to send you to a foot doctor. Anyone can have corns, blisters, and athlete's foot. If you have diabetes and your blood sugar stays high, these foot problems can lead to infections. Corns and calluses are thick layers of skin caused by too much rubbing or pressure on the same spot. Corns and calluses can become infected.
Blisters can form if shoes always rub the same spot.
Wearing shoes that do not fit or wearing shoes without socks can cause blisters. Blisters can become infected. Ingrown toenails happen when an edge of the nail grows into the skin. The skin can get red and infected. Ingrown toenails can happen if you cut into the corners of your toenails when you trim them.