A series of cortisone injections administered to the keloid every four to eight weeks by a doctor can usually shrink the size of the keloid and make it flatter.  However, sometimes they can cause the keloid to become darker in color. Interferon is another kind of injection that is being studied for the treatment of keloids, and may be an option for you. Cryotherapy is a very effective treatment for keloids, and can shrink them significantly.  In cryotherapy, liquid nitrogen is applied to the keloid to freeze away the excess cells.  Cryotherapy only takes a few minutes and can usually be done in your doctor's office.  Several treatments spaced several weeks apart may be needed to fully remove the keloid. Laser therapies for keloids are relatively new and have not been studied as much as other treatment options, but they show promise of minimizing or healing keloids.  Different kinds of laser treatments work better on different skin types, and on different types of keloids.  Ask your dermatologist if she thinks laser treatment might be right for you. Doctors are reluctant to remove keloids surgically, because there is a high chance of additional scar tissue forming at the site.  However, in some cases it may be helpful or necessary. If you have a keloid surgically removed, be sure to follow all of the after-care instructions carefully to prevent a new keloid from forming. It sounds extreme, but radiation has been effectively used for over a century to treat keloids, often in combination with surgery or other treatments.  Despite concerns over an increase in cancer risk, a recent study indicates that radiation remains a safe option if appropriate precautions (protecting cancer-prone tissues) are made. Radiation treatments are usually outpatient procedures performed at your local hospital under the care of a trained radiologist.

TL;DR in Chinese:
和医生探讨可的松注射疗法。 通过冷冻疗法治疗疤痕疙瘩。 了解激光疗法。 做手术祛除疤痕疙瘩。 进行放射疗法。