The causes of scalp distension in patients include hypertension, inadequate blood supply to cerebral arteries, psychosomatic factors, and cervical spondylosis, as follows: First, hypertension: hypertension can cause some non-specific symptoms such as dizziness, head distension, and dizziness, and it is recommended to measure blood pressure. Second, cerebral arterial insufficiency: cerebral arterial insufficiency is mainly seen in middle-aged and elderly friends with long-term hypertension, diabetes, hyperlipidemia, and scalp swelling due to scalp ischemia caused by atherosclerosis. Third, psychosomatic factors: For example, patients with long-term anxiety disorder will have some somatization symptoms such as scalp swelling and headache. Fourth, cervical spondylosis: the nerve at the top of the head mainly occurs in the neck, and if cervical spine osteophytes and herniated discs compress the nerve, it may lead to the phenomenon of swelling at the top of the head.