Some body surface tumors require and can be scheduled for outpatient surgery. The precautions before surgery are generally as follows, for reference only. The doctor may recommend ultrasound, blood test, electrocardiogram and other tests before the first outpatient surgery plan is determined, please follow the tests well. Please make sure that there are no obvious acute infections, infectious diseases, etc. and that chronic diseases are under stable control before undergoing outpatient surgery. Please take your usual long-term medications before the outpatient surgery, but stop taking anticoagulants such as aspirin for a few days before the surgery. If you are unable to stop taking such medications due to your illness, you should not undergo the surgery in general. As a rule, you can and should eat breakfast before coming to the hospital for surgery. If your doctor recommends that you take certain preventive medications before leaving home, remember to take them; bring the necessary medications, documents, files, reports, and clinic records for the surgery. The following are general precautions to take after the surgery. In some cases, the doctor may order you to take antibiotics and other medications on time. Post-operative pain is usually tolerable and there is no need to worry too much about it, but if the pain gradually worsens a few days after surgery, you should visit the clinic as soon as possible. In a few cases after surgery, subcutaneous fat liquefaction, infection, delayed wound healing or even dehiscence may occur in various masses. The wound should not be in contact with unsterilized fluids and other items until the stitches are removed, and the dressing is usually not sealed, so you should not take a shower. After surgery, attention should be paid to obtaining the pathology report at the time and deciding whether further treatment is needed based on the pathology report. Very few masses require reoperation because of the nature of the pathology (e.g., malignant); some masses should still be followed up regularly after stitch removal because some masses have a high recurrence rate.