In life, injuries caused by bumps and trips are often inevitable. The reasons for scarring are not the same for different people, and a lot of people will wonder why the scarring is different for the same injury. The reason why people have different scars from one person to another is because the formation mechanism of scars is complex and the combination of internal and external factors can leave scars with different symptoms on different people. So what are the causes of different scarring? 1. Scarring body Scarring body friends, even a small wound like a mosquito bite, can cause serious hyperplasia. The normal body, this mosquito bite will only leave a small red spot, after a period of time to recover. 2. age Young and middle-aged people, the body is in a high metabolism, hormone secretion, skin tension is strong stage, this age skin injury, leaving the possibility of scar growth or scar bumps are relatively large. 3. skin color differences Some studies have found that dark-skinned people are 6 to 9 times more likely to have scars and bumps from injuries than light-skinned people. Therefore, dark-skinned people will have more visible scars than normal people. 4. Trauma site The relatively thin layer of skin such as eyelid, forehead and other arms, etc., will mostly show discoloration symptoms after injury, and even if the scars remain, they will be relatively light; while the scars left by trauma to the ear, front money, shoulder, back and joints will mostly be hyperplasia or even scar bumps. 5. Traumatic causes The reasons for this are more obvious: scars from wounds such as explosions, burns and scalds are generally obvious and difficult to repair, while scars from scratches, knocks and surgical wounds are less obvious. At the same time, wounds that have undergone inflammatory infection or repeated irritation also have more severe scarring than wounds that have recovered normally.