Toenail deformation may be caused by trauma, fungal infection or micronutrient deficiencies, etc. Corrective methods include surgical correction, medication and so on. 1. Trauma: the nail area is bumped, squeezed and other traumas, resulting in nail damage caused by deformation of the toenail, this situation may require surgery to correct. 2. Fungal infection: Fungal infection in the nail area may cause gray nail, onychomycosis and other diseases, which may lead to deformation of toenail, destruction of toenail and many other situations. You can use antifungal medication under doctor’s guidance, such as terbinafine gel and spironolactone tablets. 3. Micronutrient deficiency: due to the lack of micronutrients, malnutrition and other reasons, may lead to the thick nail disease, easy to trigger the deformation of the toenail, hyperplasia, hyperpigmentation, and even lead to the loss of nails in serious cases. It is recommended to go to the hospital for trace element testing after the appearance of thick nail disease, and find the lack of trace elements targeted for supplementation. If you feel unwell, you should go to the hospital in time, do not blindly treat yourself, so as not to delay the condition or cause adverse reactions.