Swelling and pain in the back of the head, tightness and dry eyes may be caused by cervical spondylosis, cerebral vascular spasm and hypertension. 1. Cervical spondylosis: due to osteophytes, herniated intervertebral discs, cervical spine strain, etc., stimulate the sympathetic nerves, thus inducing the appearance of dizziness, swelling and pain in the back of the head, eye pain, dry eyes and other symptoms. 2. Cerebral vasospasm: Cerebral vasospasm is caused by cerebral vascular malformation, craniocerebral injury, tumor bleeding, etc., which leads to symptoms such as head swelling and pain, numbness of limbs and dry eyes. 3. Hypertension: Patients with high blood pressure may also have headache, fatigue and other symptoms, which may be accompanied by dry eyes. The back of the head swelling and pain, tightness and dry eyes, should go to the hospital in a timely manner, symptomatic treatment.