Symptoms of non-functional pituitary tumor can be asymptomatic, but if the tumor increases, there can be symptoms of compression, mainly including the following: First, headache. Many patients will complain of occult pain and distension in the frontal area and bilateral temporal area as the main manifestation when they visit the clinic, and the headache is caused by the pressure and tension in the dura mater. Secondly, hypermetropia and visual field defects, including fundus changes. If the pituitary tumor grows upward, it will compress the optic nerve or optic cross, which will cause hypermetropia or even double blindness, and some patients will show unilateral or bilateral hemianopia. Thirdly, hypothalamic syndrome, mainly because the pituitary tumor grows upward and affects the function of hypothalamus. Fourthly, clinical manifestations related to tumor compression to cavernous sinus, which may include eye movement disorder or proptosis, etc.