Uneven toenails that feel like waves may be the cause of nail dystrophy, onychomycosis, etc., and the cause should be identified in a timely manner. 1. Nail dystrophy: Nail dystrophy can also be caused by psoriasis and lichen planus. It can be manifested as uneven toenails that feel like waves. 2. ringworm of the nail: commonly known as gray nails, for the skin ringworm bacteria invade the nail plate and lesions caused by the nail, clinical manifestations are mainly for the toenail uneven touch like wave phenomenon. There may be other factors, such as nail lichen planus, yeast, mold, etc., but this symptom alone is not enough to diagnose the disease. It is recommended that if physiological causes are ruled out, you should consult a doctor to clarify the cause of the disease and give targeted treatment.