If a small sarcoma grows on the body and can be touched by one’s own touch, it is usually a soft tissue skin swelling. Common subcutaneous soft tissue swellings include tendon sheath cysts, sebaceous cysts, lipomas, fibroids, etc. The above swellings are mainly benign tumors, which can be diagnosed basically through local ultrasound. In the case of sebaceous cysts, consumption of fried and greasy foods that are easily inflammable may cause bacterial infection, resulting in local redness, swelling, heat, pain, and even infection, abscess formation, and pus flow. If other small sarcomas do not show symptoms of infection or deterioration, have no special local discomfort, do not affect the appearance, do not suddenly increase in size more strongly, and do not show pain, they are usually under observation and do not require special treatment, otherwise they should go to the hospital to seek medical help.