The three signs, headache, vomiting, and optic papilledema, are collectively referred to as the triad of increased intracranial pressure. The first manifestation is headache, which is more common and can have many causes and objective manifestations. The second manifestation is nausea and vomiting, which is also a relatively common symptom. The third manifestation is optic papillar edema, which requires fundus examination with special instruments to be observed. Headache, vomiting, and optic papilloedema are the so-called triad of intracranial hypertension. Headache and vomiting can be caused by many factors. If a combination of them occurs and other factors are ruled out, some tests of the optic papilla are needed to further confirm whether the headache and vomiting are caused by intracranial hypertension.