How long it takes for a tendon sheath cyst to disappear cannot be generalized, but must be judged in relation to the severity of the patient’s condition. Generally speaking, in some patients with early stage tendon sheath cysts that are mild, the cysts can be gradually reduced in size and disappear within a few days or less by rubbing. Since the early tendon sheath cyst is connected to the tendon sheath, if the cyst is rubbed, it will be gradually absorbed and cured. However, it is important to note that if the patient has a severe, persistent tendon sheath cyst, it cannot be cured by rubbing. If the cyst is not properly rubbed or squeezed, it may cause damage to other normal tissues and even increase the risk of infection. Therefore, when a patient finds a tendon sheath cyst, the most effective way is to seek medical attention and proper treatment under the guidance of a doctor to prevent delays and other adverse consequences.