1, do not ignore the foot pain, it is not caused by simple exertion, once the foot pain, to consult a podiatrist. 2, often observe your feet, pay attention to the changes in the color and temperature of your foot skin. If you find thickened and receding toenails, this may be a precursor to an infected gray toenail. 3, wash your feet often, especially between the toes, and be sure to dry them. 4, trim the toenail should be straight, not too deep, careful to trim the edges and corners of the toenail, improper trimming can lead to ingrown nails. This is especially true for diabetics or patients with poor circulatory and cardiac function, which can lead to incurable infections once an ingrown nail is formed. 5.Choose a suitable pair of shoes, it is recommended to buy new shoes in the afternoon, when the feet rise to the maximum. 6.It is recommended to choose different special shoes when performing different sports. 7.Usually a pair of shoes should not be worn continuously for more than two days. 8.Avoid walking barefoot to avoid trauma or infection. It is recommended that when walking on the beach or wearing sandals in the summer, sunscreen should be applied to the feet as with other parts of the body. 9.Do not handle any problems with your feet on your own to avoid infection or more serious problems. 10.If you are a diabetic, have a podiatry examination at least once a year.