Feeling dizziness, leg weakness, and weakness are commonly seen in the following three conditions:1. Chronic cerebral arterial blood supply insufficiency, especially in the elderly with hypertension and diabetes, if dizziness, bilateral lower limb weakness, and lightheadedness occur, they may be symptoms caused by cerebral arterial blood supply insufficiency.2. Severe anemia, with a blood pigmentation of less than 90g/L, people will feel dizziness and weakness, which may be accompanied by panic attacks, aggravated by activity, and alleviated by rest. Severe internal diseases such as coronary heart disease and cardiac insufficiency can cause dizziness and weakness after activity, often accompanied by discomfort in the precordial area and chest tightness.4 Severe renal insufficiency is often combined with anemia, and dizziness and weakness of the legs can also occur.5 Severe liver diseases such as severe hepatic insufficiency can result in poor eating, nausea accompanied by dizziness and weakness of the lower limbs, which can be treated with renal function, hepatic function, or other tests in the hospital. Hospitals for kidney function, liver function or cardiac function ultrasound examination can be clearly diagnosed.