Clinically, the big toe nail to the flesh is called nail ingrown, there are many reasons for ingrown nails, mainly in the following aspects: 1, incorrect walking posture, walking posture is not correct, will cause the nail force is not uniform and lead to the nail to the flesh. The use of orthotics for correction, the formation of a correct walking posture. 2, unsuitable shoes, shoes are too hard, walking lack of cushioning, excessive force directly on the toes, resulting in nails to the meat of the long, choose a softer and more suitable shoes. 3, walking time is longer, may be due to occupational reasons, many people walk for a longer period of time, can also lead to the nails to the meat of the long. More rest, you can carry out foot massage or more soaking feet, regular trimming toenails. 4, not often trimming toenails, to be diligent foot trimming, every time you trim the nails, pay attention not to hurt the feet to prevent infection.