Common causes of dizziness and limb weakness include anemia, brain disorders, blood pressure problems, and blood sugar problems. 1. Anemia can cause dizziness and weakness of the limbs. This condition can be found during routine blood tests when the hemoglobin or red blood cells are reduced. It is also necessary to determine whether the anemia is iron deficiency or malnutrition based on the test results. 2. Cerebrovascular disease can also cause dizziness and weakness of the limbs, especially posterior circulation ischemia. Brain Doppler ultrasound or head CT or MRI is needed to determine whether there is brain disorder. If the brainstem of the cerebellum is involved, symptoms such as choking and coughing when drinking water, difficulty swallowing, and unstable walking may occur. 3. High and low blood pressure can cause dizziness and limb weakness. At this time, it is necessary to promptly measure the blood pressure to see whether it is high or low. 4. High blood sugar and low blood sugar can also cause dizziness and limb weakness. In this case, it is necessary to check the blood sugar and glycated hemoglobin to determine. 5. Sometimes calcium deficiency can also cause dizziness and limb weakness, and this condition needs to be checked for trace elements to confirm the diagnosis. Therefore, many causes can cause dizziness and limb weakness, and patients need to be actively examined to clarify the cause.