Deep second-degree and deeper burns, traumatic injuries, surgical incisions, etc. are characterized by a process of connective tissue proliferation due to the process of wound repair, and these connective tissues are eventually replaced by a large amount of dense fibrous tissue, i.e., the formation of a scar. Scar formation is a gradual evolutionary process. Patients’ wounds are flat and soft with the pink color of newborn skin when they first heal, but they undergo unexpected changes over the next 1-2 years. The scar begins to harden and rise above the skin. If the scar is located in a joint area, it can lead to contracture deformity, which can seriously affect the appearance and function. Even like crab claw-like proliferation beyond the scope of the wound, the formation of keloids. If not treated repeatedly for months to decades can not be healed. Keloid scar growth is regular. Generally 3-12 months after healing for the proliferation period, about 6 months to reach the peak, some patients proliferation period can be 2-3 years or longer, manifested as congestion of dark red or brown, higher than the skin, hardening, pain and itching, etc.; located in the joint parts of the keloid contracture lead to deformity, especially in children will affect the growth and development, the consequences are serious. Thereafter, the scar enters the fading stage, which is characterized by a lighter color and a softer, thinner texture. Because patients do not understand the evolution of scarring, there are some misconceptions about scar prevention and treatment. They think that the healing of the wound means the end of the treatment, and they no longer need to spend money and energy on scar prevention and treatment, thus missing the best time to prevent and treat scarring. Experienced doctors will, according to the objective law of scar growth and each patient’s condition, foreseeably guide patients and their families to carry out systematic and comprehensive scar prevention and treatment, which can accelerate the maturation of keloid scars, shorten the proliferation period, reduce the pain and itching and other discomforts, inhibit the proliferation of keloid scars or minimize the degree of contracture of keloid scars, avoid the subsequent reconstructive surgeries or reduce the complexity of the surgeries, and reduce the patients’ mental pain and economic losses. Reduce the patient’s mental pain and economic loss.