The constant dizziness in the head, which is colloquial language and in medical terminology known as dizziness, is the sensation of being lightheaded. What’s wrong with this feeling. The appearance of light-headedness usually suggests that it may be caused by the following conditions, such as: first, insufficient blood supply to the cerebral arteries, which can easily lead to dizziness, light-headedness. Second, cervical spondylosis, perennial cervical spondylosis is easy to compress the carotid artery, which will lead to poor blood supply to the brain, resulting in dizziness of the head. Third, the brain itself lesions, such as the head inside the long tumor, or the head inside some blood vessel deformity, will lead to dizziness and dizziness. Therefore, if your head is always dizzy and heavy, it is best to go to the hospital to do a CT of the skull and ultrasound of the carotid artery to see where the problem is.