In case of mild nail infection, the area is only red and swollen, with mild pain and no obvious exudation, you can touch the water, such as washing your hands or feet, but not for too long. You should pay attention to your diet, such as try not to drink alcoholic beverages, do not eat spicy food, etc. If the patient has obvious redness, swelling, pain, and more oozing, it is often considered that the local infection is serious and should not be touched by water, and needs to go to the hospital’s surgery or emergency department for disposal as soon as possible. The doctor will remove part of the nail under local anesthesia, and then remove part of the necrotic tissue, and then give regular dressing changes later. Other precautions can be taken by consulting with the attending physician.