There is a tendon bundle on the top of the foot, which may be a soft tissue mass, such as tendon sheath cyst, lipoma or sebaceous cyst, or of course a bony mass such as bone cyst. It is necessary for the doctor to interview the patient, make a preliminary analysis with the physical examination, and then select the appropriate tests to determine. If the soft tissue mass is considered, local ultrasound examination can be completed. If a local bony mass is considered, X-rays and, if necessary, CT and 3D reconstruction are required. If the mass is a tendon sheath cyst or lipoma, which does not affect normal shoe walking, then it can be followed up and observed. If the tendon package is relatively large and affects normal walking in shoes, it can be routinely removed surgically; pathological examination is routinely done after surgery to exclude other masses. Generally speaking, there is a certain probability of recurrence after surgery, so pay attention to the follow-up observation.