The following three conditions are common in clinical practice: 1. Local subcutaneous lipoma or sebaceous cyst, which usually requires further ultrasound examination for clear diagnosis and surgical removal under local anesthesia after clear diagnosis. 2. Hematoma formed by bruising of local subcutaneous tissues after trauma, which is manifested as skin bruising, usually after rest and local use of blood-stasis-boosting drugs to promote absorption of the hematoma. 3. 3, mainly due to long-term sports, or local ankle joint activities caused by joint cysts, also known as tendon sheath cysts, usually need further ultrasound examination to clarify the diagnosis. For tendon sheath cysts in the ankle, it is usually necessary to rest and reduce activities, and it may shrink or even disappear. If it does not disappear in the long term or if severe symptoms appear, further surgery is usually needed to remove the cyst, but it is likely to recur after surgery.