Café au lait is a relatively common pigmented disease in dermatology, which can occur in different parts of the face, trunk and limbs, and often appears at birth. For infant coffee spots, it is recommended to deal with them as early as possible. Currently, the main method is to treat them with Q-modulated laser, and the commonly used wavelengths are 532nm Q-modulated laser, and 755nm emerald laser, most of which have very good effects. There are some coffee spots, especially those with more regular edges, and the effect is relatively poor from clinical experience. For irregular coffee spots with sharper edges like jagged, the effect is relatively better. On the whole, for coffee spots, laser treatment is the main treatment at present, which can often achieve the purpose of eliminating without breaking the skin and leaving scars.