Different types of headaches have different symptoms. A throbbing sensation is usually associated with a vascular headache, while nausea and vomiting or visual disturbances are characteristic of a migraine headache. There are also sinus headaches or headaches associated with premenstrual syndrome. A change in intensity or frequency of headaches should warrant you to seek prompt medical attention. Extremely intense pain can signify a hemorrhage, tumor, aneurysm, or serious infection.
Visual problems can cause a headache because of the strain put on the eyes to see.
This is a medical emergency. High blood pressure may cause throbbing, but normally does not cause chronic headache. Usually through a thorough physical exam and history, a doctor can determine the cause of the headaches. Meningitis and other infections can be found through these methods. An MRI or CT scan can be performed to see if there is a structural reason for the headaches.