Bumps can be treated with physical, pharmaceutical, and laser methods that may reduce the size of the scar or leave no scar. Scars are formed when capillaries rupture and soft tissues are damaged after a bump so that spilled blood crusts over to form a protective layer, promoting the growth and healing of muscle fibers. It needs to be treated with disinfectant bandage in time, and if there is a serious laceration, the scar can be reduced by suturing. Scars can be prevented from forming and growing by localized use of scar removing stickers, scarring agents, etc. For more obvious scars, they can also be treated by laser polishing, etc. In addition, if the scar is formed after a bump, it can be treated by the laser. In addition, if the scar has not completely fallen off and the skin has not healed after the bump, you should not knead it with your hands because it will cause the scab to fall off, which will cause inflammatory reaction of the skin, so you should pay attention to keep the skin dry and clean to prevent scarring. Patients with bumps and bruises should do disinfection in time and go to the hospital for standardized treatment in time when it is serious.