The pain or itching of keloid is mostly due to the blockage of sweating and excretion in the area, which can be relieved by drugs such as scar enemy, scar spirit and scar rejuvenation, but such drugs are not effective in removing the scar. If the scar is located in a functional area such as a joint, which affects its movement, it needs to be treated by surgery; if it is a keloid, radiotherapy is also required after surgery. If the scar is located in a more hidden area such as the knee, no intervention treatment can be performed. The specific medication should be combined with the clinical situation and guided by the doctor in an interview.