Clinically, the big toe nail to the flesh is called nail inlay, there are many reasons for nail inlay, mainly the following: 1, incorrect walking posture, walking posture is not correct, will cause the nail uneven force and lead to nail to the flesh long. The use of orthotics for correction, the formation of the correct walking posture. 2, inappropriate shoes, shoes too hard, walking lack of cushioning, excessive force directly on the toes, resulting in nails to the flesh long, choose softer and suitable shoes. 3, walking for a long time, perhaps due to professional reasons, many people walk for a long time, will also lead to nails to the flesh long. More rest, you can do foot massage or more foot soak, regular trimming of toenails. 4, infrequent trimming of toenails, to be diligent foot trimming, each time you trim the nails take care not to hurt the feet to prevent there is infection.