Whether or not a scar remains after the scab comes off depends mainly on whether or not there is damage to the dermal layer of the skin and the individual’s physical condition. Generally speaking, regardless of whether or not the wound is flat after the scab comes off, if the skin damage reaches the dermis layer in the early stage, scarring is possible; if the dermis layer has not been damaged, scarring will not be left in general. However, for keloid patients, any skin injury, regardless of the degree of injury, will leave a scar. During the wound recovery period, care should be taken to avoid irritating foods and strictly protect the skin from the sun. In addition, before scabbing, recombinant human epidermal growth factor ointment can promote the repair process of skin damage, thus reducing the probability of leaving depressed scarring.