The red mark when the scab comes off is mainly caused by skin inflammation not fully recovered and vascular dilatation, the treatment is mainly moisturizing and soothing, sunscreen and pulse dye laser treatment, under normal circumstances, there is no obvious effect of external ointment. 1. Moisturizing and soothing: the local red marks appearing within a short time after the scabs fall off is a normal physiological phenomenon, with the passage of time will gradually fade or even disappear, so generally no need to do too much processing, mainly the appropriate use of some moisturizing effect of the skin care products. 2. Sun protection: local skin stimulation by ultraviolet rays may cause hyperpigmentation. 3. Pulsed dye laser treatment: this is a commonly used cosmetic method, which has a certain effect on red marks caused by vascular dilatation. Due to individual differences, the degree of red marks and the time of fading may also have some variations, the specific conditions need to be consulted by a doctor first.