Many of the daily outpatients describe their symptoms as: headache, dizziness, memory loss, lethargy, etc. Many of these patients suspect that they have brain infarction, or brain tumor, etc. In fact, in many cases there is nothing wrong, the main problem is still hypertension, neurasthenia, mild cold, bad mood, sinusitis, refractive error, dental caries, etc. Very few of them are caused by cerebral arteriosclerosis, so do not panic when similar symptoms appear, a simple examination can be understood, and timely treatment of these problems can avoid serious brain diseases.