The cause of dizziness, weakness of limbs and sleepiness may be caused by cerebrovascular disease, heart disease, insufficient blood volume or excessive fatigue, etc. It should be analyzed in conjunction with the triggers of the onset of the patient and other accompanying symptoms: 1. If the patient is suffering from diarrhea, vomiting and other conditions that lead to a large loss of body fluids, it will cause insufficient blood volume, resulting in the above symptoms in the patient. 2. If the patient has cerebral If the patient has cerebral insufficiency, cerebral arteriosclerosis, cerebrovascular stenosis, etc., the acute attack will lead to dizziness, weakness of limbs, and sleepiness. 3, if the patient has chronic cardiac insufficiency or episodes of atrial fibrillation, or frequent premature ventricular beats, the pumping function of the heart will be affected, which will also cause dizziness, weakness of limbs, and sleepiness. 4, when the person is extremely tired The above symptoms may also occur under extreme fatigue.