The common symptoms of brain tumor in early stage include increased intracranial pressure manifestation, neurological function abnormality, epilepsy and so on. 1. Increased intracranial pressure: including early morning headache and vomiting. Headache mainly occurs in the early morning, and often wakes up with pain during sleep; vomiting is violent and projectile vomiting, which has nothing to do with eating, and usually occurs suddenly after headache, which is due to intracranial occupation resulting in elevated intracranial pressure, and a series of symptoms appear. 2. Abnormal neurological function: due to the compression of brain tumor, a series of symptoms such as visual impairment, crooked mouth, sensory loss, phantom vision, uncoordinated activity of one side of limbs, unilateral deafness, etc. are caused by the tumor compression and stimulation of the relevant nerves. It is because the tumor presses and stimulates the relevant nerves. 3. Epilepsy: Unexplained epilepsy symptoms appearing after adulthood is also a common early-onset symptom of brain tumor. When the patients have the above symptoms, they should go to the hospital for consultation and timely treatment under the guidance of doctors to clarify the cause of the disease.