What are the symptoms of liver deficiency and kidney yin-yang deficiency?

　　Symptoms of liver deficiency and kidney yin-yang deficiency generally manifest as soreness and weakness in the lower back and knees, dizziness, blurred vision, mental fatigue, mixed cold-heat manifestations, and decreased vision. A detailed analysis is as follows:

　　1. Soreness and weakness in the lower back and knees: The liver and kidney share a common origin. Deficiency of the liver and kidney yin-yang leads to insufficient nourishment of the lower back and knees, often accompanied by dull low back pain, limb weakness, worsening symptoms after exertion, and little relief after rest—this is one of the typical signs of this constitution.

　　2. Dizziness and vertigo: The liver opens into the eyes, while the kidney governs the storage of essence and the production of marrow. Insufficient marrow sea (brain nourishment) and liver blood deficiency can cause dizziness and vertigo, often accompanied by poor memory, tinnitus, and hearing loss, with discomfort becoming more pronounced after prolonged sitting or standing.

　　3. Mental fatigue: Deficiency of both kidney yin and yang results in insufficient primordial qi, while liver deficiency impairs the course and discharge functions, leading to overall symptoms such as lethargy, excessive sleepiness, reduced speech, low mood, lack of interest in daily activities, and easy exhaustion even after minor physical activity.

　　4. Mixed cold and heat symptoms: Kidney yin deficiency may present with deficiency-heat symptoms such as dry mouth and throat, and warm palms and soles; kidney yang deficiency manifests with cold-intolerance, cold limbs, and clear, copious urination. Liver deficiency exacerbates this yin-yang imbalance, resulting in simultaneous presence of both cold and heat symptoms.

　　5. Decreased vision: As the liver opens into the eyes, insufficient liver blood fails to nourish the eyes, leading to blurred vision, dryness, photophobia, and eye strain. Meanwhile, kidney yin-yang deficiency affects the generation of essence and blood, further aggravating ocular discomfort and potentially causing night blindness.

　　When these symptoms occur, a comprehensive evaluation based on overall presentation is necessary to ensure proper pattern differentiation; diagnosis should not rely solely on individual symptoms. It is important to avoid staying up late, which depletes liver and kidney essence-blood, maintain warmth, and avoid excessively hot or drying foods. When symptoms are significant, it is advisable to consult a healthcare practitioner for a personalized treatment and regulation plan, rather than blindly tonifying.