There are many causes of heel impingement. Common causes include vitamin deficiency, inappropriate shoes, and fungal infections of the feet. 1. Lack of multivitamins: If the body lacks vitamins, such as vitamin A, vitamin B and so on. Vitamin A can keep the skin moisturized, and vitamin B has the effect of preventing foot fungus and pellagra. Long-term lack of these two vitamins will lead to dry and cracked skin, and then the phenomenon of barbs on the heels. 2. Inappropriate shoes: It may also be that the material of shoes is not good or the size is not appropriate, resulting in friction between the foot and the shoe when wearing shoes, and prolonged friction may lead to the appearance of barbs on the heel. 3. Fungal infection of the feet: there may be fungal infections of the feet, leading to local itching and dry cracked skin, which may also cause heel barbs. There may be other reasons for heel impaction, so it is recommended to go to the hospital in time to find out the cause of the problem and treat the symptoms.