Patients with onychomycosis can use alcohol for disinfection, but there is a requirement for the concentration, and it is recommended to use 85% medical alcohol, which is more effective. However, it is still recommended that patients use other anti-inflammatory drugs for treatment, such as iodophor solution or Pepto-Bismol. Because alcohol is more irritating to the skin, it will cause patients to experience pain and discomfort, while the use of other drugs such as the latter two, less irritating to the skin, will not cause pain. If the local redness, swelling and oozing are more serious, it is not recommended to dispose of them by oneself, and it is recommended to go to the hospital surgery or emergency department as soon as possible for treatment, and the doctor will change the medicine regularly. In severe cases, it is also necessary to remove part of the infected tissue under anesthesia at the root of the finger, and at the same time remove part of the nail, and then carry out regular dressing changes. During the treatment period, the area should be kept away from water as much as possible, while the fingers or toes should be kept as inactive as possible to prevent the infection from worsening.