The scars cut with a knife are generally referred to as keloid scars, which are irremovable once formed, and can be improved through medication (such as silicone gel) and surgical treatment when there is a need for cosmetic treatment. 1. Medication: Silicone gel can be used externally to inhibit the proliferation of hyperplastic keloid scars during the period of hyperplasia; local injection of Triamcinolone acetonide can also be used to promote the softening and atrophy of keloid scars in stable and old keloid scars. 2. Surgery: When the scar seriously affects aesthetics or causes local dysfunction, the scar can be removed through surgery, and commonly used surgical methods include keloidectomy with direct suture, keloidectomy with Z-plasty, etc. The scar can also be cut with a knife. Scars cut with a knife can also be treated with laser therapy, when you need treatment, you can go to a regular hospital, under the guidance of specialists to carry out the relevant treatment, and strictly comply with the doctor’s instructions for the use of medication.