The causes of frequent dizziness and weakness of the limbs are as follows: 1. Consider that it is caused by anemia, which can be clarified by routine blood tests and treated for the cause. 2. Consider that it is caused by mental and psychological factors, if the patient has serious anxiety and tension, there are usually somatization symptoms, and the patient will feel dizzy and weak. 3. The weakness of the limbs may be due to cerebral atherosclerosis, insufficient blood supply to the brain, or due to heart disease. For example, patients with cardiac arrhythmia or chronic cardiac insufficiency, heart failure, resulting in the pumping of blood to the heart is affected, resulting in insufficient blood supply to the brain will lead to dizziness.