After playing basketball, especially after a long period of continuous high intensity, long time playing basketball, due to wearing the wrong shoes, or incorrect habits with the feet, may lead to nail bruising, there will be toenail purple, blue situation. It is important to avoid strenuous activities in the near future, wear loose shoes, and if necessary, you can take oral Chinese medicine to activate blood circulation and remove blood stasis, such as Blood Mansions and Stasis Capsules, Zhi Kang Capsules, etc., all of which have certain effects. Even if left untreated, most of them will gradually improve after six months.