”The wound area has been red since I had my eyelid cut, and it won’t heal for several weeks, will it leave scars?” The doctor pointed out that the speed of wound healing is related to age, nutrition, post-operative maintenance and other factors, and the faster the wound heals, the less likely it is to leave a scar. The faster the wound heals, the less likely it is to leave a scar Experts point out that the general principle is that the faster the wound heals, the lighter the scar. The ideal scar is a thin, flat, white scar that is parallel to the lines of the skin and not easily detectable. Many thin, flat, white scars that have degenerated over time are also considered ideal scars. The most “difficult” scars are those that are wide, sunken or raised, or form a long, thick, red and swollen scar, the most “difficult” being the “crab foot swelling” (scar hyperplasia). Generally speaking, the healing of normal wounds can be divided into 3 stages from fresh wounds, healing wounds to scars: the inflammation and contraction response stage, the formation of granulation tissue repair stage and tissue reconstruction to form scars. The first phase, inflammation and contraction response, is very important in the wound healing process to avoid co-infection and scarring. In addition, the contraction of the wound edges will also induce the wound skin to secrete collagen to repair the wound tissue and affect the wound healing status. Age, post-operative maintenance, etc. determine how fast or slow the wound will heal. Experts point out that there are many factors affecting the speed of wound healing, including age, wound infection, etc., but also related to whether anemia, nutritional status, stress and post-operative maintenance and dietary regimen. The wound healing speed of the elderly will be significantly slower than that of the young, and people who are malnourished or obese, and those who lack vitamin A or C or zinc, iron and copper, will have slower wound healing. After plastic surgery and trauma, if the blood circulation of the wound is poor and the wound is subject to gravity, the wound will heal slowly. Post-operative maintenance should not be underestimated. Smoking, drinking and eating more spicy food after surgery will slow down the healing process. People who take hormonal drugs and suffer from diabetes, chronic obstructive pulmonary disease, uremia, cancer, liver failure, and vascular diseases will also need longer time to heal their wounds. It is important to mention that psychological factors also have an impact on wound healing, and people who are under stress have slower wound healing.