It is likely to be onychomycosis, which is often referred to as gray nails. But if it is not gray nail, you can do a local fungal test, if you can detect the fungal spores, then you can diagnose whether it is nail fungal disease.

Gray nail treatment methods:

1, Western medicine will generally use oral antifungal drugs, and then external fungicidal ointment, but oral antifungal drugs on the liver and kidney damage is relatively large

2, the available traditional Chinese medicine soak, to kill the fungus, because the fungus is a small microorganisms, which may be present in the skin or ointment can not be coated with the place, so the effect of using traditional Chinese medicine soak than wipe the ointment to the effect. It is better to use Chinese medicine to soak than to apply ointment.

3, the Chinese medicine soaked, and then sealed package treatment, be sure to cooperate with the external ointment.

4, usually the patient's hygiene details should pay attention to good, socks, shoes must cooperate with the systematic treatment, so that the effect of the treatment of gray nails will be very good, and do not recur.

Expanded information:

Symptoms represented by different nail colors:

First of all, whitish nails are nails that are pale in color and lack of blood, mostly because of malnutrition, or there is anemia, in addition, if the nails suddenly turn white, it is often because of blood loss, shock and other emergencies, or hookworm disease, gastrointestinal hemorrhage, late tuberculosis, lung-derived heart disease and other chronic diseases, press the nails become white, release a long time does not return to the blood color, then it may be stagnant blood;

If reddish then there is heat or yin deficiency and labor heat conditions;

Dark red or red purple, mostly refers to wind-heat toxicity, but also may be muscle, tendons, bones and joints, such as soreness or numbness, gout and other conditions;

Nail color grey mostly due to a lack of oxygen caused by, generally Smokers are more common. For non-smokers, the nails suddenly turned gray, the biggest possibility is suffering from onychomycosis, the initial edge of the nails will be itchy, and then the nails will be deformed, lose luster into gray, such as gray nails;

Nails yellow, in Chinese medicine, think more by the hot and humid caused by the fumigation, is usually hypothyroidism, carotenemia, nephrotic syndrome, and so on. Western doctors believe that the nails are yellowish mostly related to the lack of vitamin E in the body. If all the nails are yellow, it is necessary to receive treatment, because it is a symbol of the whole body weakness.

The greenish color of the nails is mostly a sign of cold, pain, or blood stagnation. If the nails are so green that they turn black, then the condition may be serious enough to warrant medical attention.

Reference:

People's Health - Health Secrets on Nails Hands on from Nails

People's Health - Saying Goodbye to Gray Nails It's Not So Hard