Scarring is a necessary condition for healing, and as long as there is an injury, scarring is inevitable. In general, the vast majority of people are not keloid. Only when the scar continues to grow and enlarge after the wound has healed, with pain, redness, swelling and itching, and when the scar is larger than the original wound, is the person considered to be a keloid. How can we determine keloid in everyday situations? If there is no obvious trauma, or if there is a raised red lump on the chest or back when there is a mosquito bite, keloid can be considered. If a scar that is larger than the original wound or itchy above the skin surface appears after a traumatic injury (usually about a year), it may be a keloid. Is it true that if a scar is left, it must be a keloid? If a scar appears after surgery or trauma that is whitish in color, flatter than the skin surface, and without discomfort, it is generally not considered to be a keloid, and there is no need to worry too much when undergoing surgery.