Wounds that heal without scarring, such as first-degree burns, superficial second-degree burns, minor skin contusions, etc., will look essentially like normal skin within a month of healing. If a scar is formed, it will always be different from normal skin.
If only the epidermal layer of the skin is injured, which is equivalent to a first-degree burn, the skin will usually heal within a week after the injury without scarring. After healing, it usually takes about a week to recover and the skin is able to look like normal skin.
If the superficial dermal layer of the skin is injured, which is equivalent to a superficial second-degree burn, the wound is cleared and other treatments are carried out, and no infection occurs, the skin usually heals within 14 days after the injury. The wound will not leave a scar, but the skin color will become red or light, and will gradually return to normal after one month.
If a scar remains after the wound heals, it will never return to normal skin.