There are many reasons for dizziness and lack of clarity in the head, the specific analysis is as follows: 1, excessive mental stress, if excessive fatigue, suffering from depression or anxiety will appear neurological symptoms, such as pain, dizziness, unclear nerves, you can improve interpersonal relationships, relax, and psychological guidance, if necessary, drug treatment. 2, cerebrovascular blood supply is insufficient, there are blood system diseases such as hypotension, anemia caused by Insufficient cerebrovascular blood supply, need to actively treat the original disease, more blood tonic drugs, treatment of blood system diseases, if it is atherosclerosis need to solve the problem of vascular plaque. 3, vagus nerve disease, there will be tinnitus, dullness, dizziness, headache, need to maintain a quiet environment, avoid the stimulation of light and sound, can take oral antihistamines or phenothiazines to relieve symptoms.