Patients with cerebral blood supply deficiency do not usually experience forehead tightness. Insufficient blood supply to the brain can be clinically divided into insufficient blood supply to the internal carotid artery system and insufficient blood supply to the vertebrobasilar artery system. Most patients with inadequate blood supply to the internal carotid artery system may present with episodic hemianesthetic sensory-motor deficits in the lateral extremities, and may also present with vegetative dysfunction. In the case of inadequate blood supply to the vertebrobasilar system, the main manifestations are dizziness, nausea, and vomiting. Some patients may also present with balance disorders, ataxia, diplopia, and nystagmus. Patients with chronic cerebral insufficiency of blood supply can develop ischemic-hypoxic encephalopathy, and patients can manifest memory loss, inattention, or even incoherent thinking. Forehead tightness is mostly seen in patients with mental tension and stress.