Dry eyes may be caused by liver fire or yin deficiency. According to Chinese medicine, the liver is wood and has an opening in the eye, and the eye is the organ where the liver manifests itself externally. When the liver is abnormal, it can lead to discomfort in the eyes. Therefore, the liver fire is exuberant, the upper inflammation in the eyes, it is possible to cause dry eyes, redness, blurred vision and other symptoms, but also accompanied by dry mouth, dizziness, red face and other symptoms. Yin fluid has a moisturizing and nourishing effect, when the body is in a state of yin deficiency, whether it is yin deficiency of the liver and kidney (deficiency of yin fluid in the liver and kidney), qi and yin deficiency (deficiency of qi and yin fluid) or yin deficiency and dampness and heat, will lead to yin deficiency, can not be glorified in the eyes, triggering the symptom of dryness of the eyes. In addition to this, it will be accompanied by the typical symptoms of yin deficiency such as five heart-heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), sore throat, dry mouth, and so on. Therefore, both liver fire and yin deficiency can lead to dry eyes, which need to be combined with other symptoms to clarify the cause. If there is any discomfort, prompt medical attention is recommended.