Brain tumors compressing nerves can produce symptoms such as visual field disorder, auditory disorder, olfactory disorder, eyelid ptosis, eye movement disorder, and facial hypesthesia. Different parts of the brain tumors can produce different symptoms by compressing the nerves. Brain tumors in the frontal lobe can compress the olfactory nerves leading to unilateral or bilateral olfactory impairment; tumors in the saddle area can lead to visual field and visual acuity disorders; tumors in the cavernous sinus area can produce symptoms of eyelid ptosis, ocular motility disorders, and facial hypesthesia by compressing the brain nerves. Tumors in the brain compressing brain tissues or brain nerves should be treated in time to relieve the compression of brain tissues and nerves by tumors, and to prevent irreversible consequences caused by prolonged compression.