Hands scratched by nails leave scars, is due to the wound healing process, due to their own physical reasons or improper care, resulting in excessive proliferation of fibroblasts, through daily care, topical drugs, laser therapy to improve the appearance of treatment. 1. Daily care: avoid scratching and rubbing the scars to cause re-injury; avoid sun exposure to the scars to avoid hyperpigmentation. 2. Topical medication: Early scar formation can use creams containing onion extract or silicone, which can inhibit scar proliferation. 3. Laser therapy: Combined laser therapy is also available, commonly used are dye laser, carbon dioxide fractional laser and erbium laser. Generally, it takes several regular treatments to achieve the desired effect. Scar treatment should be carried out under the guidance of specialists and standardized scientific medication.