The causes of dizziness and limb weakness are as follows: 1. Hypoglycemia: If blood sugar is lower than 3.8 mmol/L, the patient may experience dizziness and weakness accompanied by panic and sweating, and the above symptoms can be relieved sooner after sugar supplementation; 2. Cardio-cerebral vascular diseases: If atherosclerotic plaque formation causes myocardial ischemia, brain ischemia and limb muscle ischemia, the patient may experience dizziness and limb weakness. The patient may experience dizziness and weakness of the limbs. If patients have heart disease, they may also have panic attacks and blood pressure drop, which can be clarified by coronary angiography, cranial CT or vascular ultrasound. Dizziness and weakness of the limbs may occur.