Infections of the nail plate or nail tissue caused by various fungi are collectively called nail fungal disease, commonly known as “gray nails. Most nail fungal diseases are caused by direct transmission of ringworm on the hands and feet. Susceptibility factors include genetic factors, systemic diseases (such as diabetes), localized blood or lymphatic drainage disorders, trauma to the nail, or other nail diseases. There are many ways to treat onychomycosis: you can use topical onychomycosis drops (e.g., compound benzoic acid solution) to treat gray nails; there are surgical procedures to dial the nail; after the diseased nail is cleared, the fungus is removed with iodine until the new nail grows out; if the liver function is not abnormal, you can take oral medications to treat onychomycosis, which also achieve good results, commonly used drugs are: spironolactone, terbinafine, etc. They can be used alone or in combination. The main effects of nail fungus are: 1. Affects aesthetics: As the saying goes, “The hand is the second face of a person.” The beauty of the hands directly affects a person’s temperament. If you have grey nails on your hands, you will be ashamed to shake hands with others and feel embarrassed, not to mention other more intimate and close actions. 2, produce abnormal psychological barriers: gray nail patients, especially when long-term treatment is ineffective, often have a sense of embarrassment and frustration that can not be shaken off. Especially when certain aspects, such as work marriage life socially affected and failed, the psychological blow to patients than normal, often resulting in a sense of inferiority. 3, affect the daily life: finger (toe) nail has a great physiological significance to us. The work that human beings engage in such as threading a needle and writing, cooking, typing, knitting, playing, etc., cannot be done without the assistance of the nails. Once you get a gray nail, this kind of work will be interfered with. Finger (toe) nails grow at the end of the hands and feet have a protective role, once the disease, the hands and feet will be easy to collision and injury. It also adds twist and trouble to wearing shoes and socks. 4, complications: gray nail serious can cause pain and discomfort. The nail is exposed to the muscles or pressed by the thickened nail, and once it is traumatized by various traumas, bacteria can easily drive in and cause complications such as nail fungus and nail beditis. Some patients experience serious systemic symptoms such as dermatitis and cellulitis. 5, become a source of infection: gray nails inside the fungus is invisible to the naked eye, often to the outside world to spread pathogenic fungus infectious source. Grey nails can inoculate the fungus to other parts of the body with scratching and new ringworm occurs; and they can also cause ringworm in family members and friends. Modern medical research has proven that women with gray nails can infect the pubic area and form gynecological diseases that are difficult to cure, such as mycosis fungoides. Gray nail germs can also invade deep tissues of the body, causing infections in deep tissues and organs, and even endangering lives.