The phenomenon of toenails appearing layer by layer like waves is usually more likely to be caused by nail dystrophy, nail fungus, etc. It is recommended that patients can go to the dermatology department of the hospital to improve the relevant examination to help confirm the diagnosis and timely treatment, common causes and treatment measures can be seen in the following areas: 1, nail dystrophy: can be caused by a variety of reasons, the most common cause is psoriasis, nail flat moss, eczema and other skin diseases, in addition Tumor, inflammation, iron deficiency, anemia, etc. may also cause nail dystrophy. It may appear as a central depression of the toenail surrounded by a bulge, roughness or whitening, thickening, etc. Sometimes it may also appear as a wavy toenail change. Treatment is usually determined by the cause, such as nutritional deficiencies, which can be supplemented with related nutrients, such as iron deficiency, which can be supplemented with animal blood, animal liver and red meat. If the nail is malnourished due to psoriasis, eczema, flat moss or other skin diseases, you should treat the skin disease to relieve the symptoms; 2. The nail may be wavy. The treatment of onychomycosis is based on medication, and commonly used drugs include topical drugs such as amorolfine and ciclopirox, and oral drugs such as terbinafine and itraconazole, etc. Adherence to medication is beneficial to the improvement of symptoms. To help confirm the diagnosis, and under the guidance of the doctor to take the appropriate treatment.