Green stuff in lips may be related to careless bites, oral ulcers, pigmented nevi, etc. The cause should be clarified and then treated for the cause, such as medication. 1. Accidental bites: green stuff in the lips may be accidentally bitten when eating, resulting in capillary damage caused by local blood seepage. At this time do not need to worry too much, and do not need to do special treatment, oozing blood can be self-absorbed and subside. 2. Mouth ulcers: green stuff in the lips may be mouth ulcers. At this time can be applied locally oral ulcer cream, or dexamethasone glycerin paste. At the same time can give compound metronidazole gargle gargle. Usually should pay attention to light diet, more intake of vitamin-rich food. 3. Pigmented nevus: Most of them are found in the skin of face and neck, and occasionally in the oral mucosa. Most of the skin pigmented nevi do not need to be treated. For aesthetic needs, or located in easy friction and damaged parts, they can be surgically excised or treated with laser. Oral mucosal nevus may be similar to early malignant melanoma, so for those who are not sure about the nature of the nevus, surgical excision and biopsy are recommended. Surgical excision and biopsy are recommended to clarify the nature. There may be other reasons for the green stuff in the lips, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.