Leg weakness may be due to kidney deficiency or spleen deficiency, but one symptom alone is not enough to determine a certain type of evidence; leg weakness may also be due to impotence, heart qi deficiency, and so on.
1. Kidney deficiency is caused by mental factors, work fatigue, prolonged illness, etc., and is manifested as weakness of the legs, dizziness, and memory loss.
2. Spleen deficiency is mainly caused by diet, spirit, disease and other factors, and in addition to leg weakness, it can also be manifested as reduced diet, abdominal distension and so on.
3. Impotence can also cause leg weakness, often due to external warmth and toxicity, diet and fatigue, etc. It can also be manifested as muscle atrophy and unfavorable activities.
4. Heart qi deficiency is caused by insufficient heart qi, physical weakness, overwork, etc. It often manifests as leg weakness, chest tightness and shortness of breath, mental exhaustion, etc.