Patients with milder tendon injuries usually take about 28 days to heal on their own. Patients with more severe injuries will need to undergo formal treatment such as surgery to close the tendon, which usually takes about 2 months to heal. If the tendon is mildly injured due to collision or twisting, most patients do not need treatment and can recover on their own in about 28 days by keeping the tendon in a state of braking, avoiding activities or resting in bed. If the tendon injury is more serious, such as tendon rupture or tearing, after taking regular treatment such as surgical suture, patients usually need about 40 days to gradually return to normal activities, and full recovery usually takes about 2 months, or even longer if the symptoms are serious. Therefore, not all patients with tendon injuries can heal on their own, depending on the extent of the injury. If the patient has a tendon injury, it is recommended to go to the hospital in time for relevant imaging examination and standardized treatment under the guidance of the doctor.