Uneven toenail cover may be caused by trauma, onychomycosis, lack of trace elements and other factors. 1. Trauma: If the patient’s toenails are squeezed or bumped by gravity, it will lead to damage of the nail beds, which will cause the nutrients not to be supplied to the nail beds, causing the unevenness of the toenail cover. 2. Ringworm: if patients often wear airtight shoes, it will lead to the feet in a hot and humid environment for a long time, which will breed fungus, when the fungus infects the toenails, it will trigger local inflammation, resulting in ringworm, so that the patients have uneven toenail cover. 3. Lack of trace elements: If the patient’s usual intake of nutrients is insufficient, it will lead to the lack of trace elements in the body, such as calcium, zinc, selenium, magnesium and so on. The toenails may not get enough nutrients, resulting in the symptoms of uneven toenail caps, accompanied by a lack of luster and so on. When patients have uneven toenails, they need to go to the hospital in time for a comprehensive examination to clarify the cause of the disease and then treat the symptoms.