Scars that have been on the body for many years, i.e., old keloids, can be removed mainly by medication, laser treatment and surgery. 1. Medication. For some stable scars or keloid scars that seriously affect the appearance, the symptoms can also be improved by local injection of glucocorticoid drugs, such as local injection of trimethoprim injection, betamethasone injection and so on. 2. Laser treatment. Using the heat energy of laser to cause thermal damage to local tissues, thus promoting collagen regeneration and collagen rearrangement, which will help to improve the appearance of keloid scars. 3. Surgery. Surgical excision is a quicker way to remove scar tissue, but people with keloid scarring are most likely to form new scars, so it should be chosen with caution. Due to the different physique of individuals, there will be some changes in the choice of treatment, the specific circumstances, you need to go to a regular medical institution to find a specialist doctor interview, and then choose the appropriate treatment plan according to the actual situation.