Laser is a certain energy beam shot to the dermis layer of the skin, the skin to carry out controlled damage to the skin, so that the skin itself for healing. Post-laser precautions can be roughly divided into the following 4 points: 1, after treatment, you can carry out ice packs for about half an hour, until the face of the feeling of micro-hot subside can be. 2, the local can be wiped with growth factors to promote the healing of the skin, generally 4-6 hours can be replaced until the scabs fall off, generally need about 1 week. 3, diet should pay attention to a light diet, avoid spicy and stimulating food, prohibit smoking, prohibit alcohol. 4, but also Strictly sunscreen, generally within 2 months after surgery will appear slight hyperpigmentation, this time do not have to worry about, hyperpigmentation will slowly disappear over time, generally 6-8 months hyperpigmentation can basically disappear completely.