Tightness in the top of the head is not a manifestation of cancer. Tightness in the top of the head is often related to insufficient blood supply to the head, such as stress and fatigue or suffering from high blood pressure or cervical spondylosis, which leads to insufficient blood supply to the head and spasms of blood vessels, and then the top of the head will have a tightening sensation. Sometimes some neurological diseases in the head, such as migraine, may also cause symptoms of tightness in the head, which are not manifestations of cancer. Cancer is a kind of disease with unknown etiology, which is caused by malignant proliferation of cells in the body. Cancer of different organs has different manifestations, even if the tumor occurs in the brain, most of the symptoms are headache, dizziness, or hemiplegia caused by compression symptoms, which seldom have the manifestation of tightness in the top of the head. Therefore, there is no need to be too afraid of dizziness and tightness, which is generally not related to cancer. If the symptoms persist and worsen, you can go to the neurology department of the hospital.