Dark lips are usually not a sign of kidney deficiency, and are often related to cold or qi stagnation and blood stasis (blood stasis due to lack of qi flow). However, the exact cause needs to be decided in conjunction with the patient’s other symptoms. A normal person’s lips are reddish in color, indicating that there is sufficient qi and blood. Dark lips, on the other hand, are thought to be related to cold, or caused by stagnation of qi and blood stasis, or internal heat. Cold winter season wearing thin clothes, will lead to obstruction of qi and blood operation, and over time the cold stagnation of blood stasis will appear black lips, often accompanied by the limbs are not warm, afraid of cold and other manifestations. Temper tantrums, depression, etc. will affect the operation of the qi, resulting in stagnation of qi and blood stasis, manifested in the lips will appear black lips, often accompanied by the coarseness of the ribs and swelling and pain, like to sigh and other symptoms. Internal depression and heat will also affect the operation of qi, which will also form blood stasis, often accompanied by irritability, thirst and other symptoms. If the symptoms of black lips are not relieved for a long time or accompanied by discomfort, it is recommended to consult a doctor in time.