Tendon injuries usually take 2-6 weeks to recover, as follows: First, for mild tendon strains, the patient only needs to brake for about two weeks, and the tendon can usually recover completely without significant effects. Second, severe tendon strains, such as tendon rupture, require surgical repair, including direct suturing of the tendon, stop reconstruction, and tendon reconstruction. With surgical treatment coupled with external fixation, the patient can gradually repair in about six weeks before the adjacent joint and limb function can return to normal levels. Regardless of the extent of the tendon injury, the patient will require a long period of rehabilitation before the tendon injury can be restored to a normal level to avoid interfering with normal work and normal life.