The signs and symptoms of a brain tumor vary depending on its location, size and rate of growth. In general, most symptoms of a brain tumor begin gradually and become more severe with time. However, in some cases, there may be a sudden onset of specific symptoms due to the location of the tumor. 

Many brain tumors produce symptoms that are related to pressure in and around the brain. There is limited space inside the skull and a tumor or extra tissue can result in an increase in intracranial pressure (ICP).  The increased pressure can cause generalized symptoms including:

• Headache
• Nausea and vomiting
• Blurred vision
• Drowsiness or lethargy

Headaches are a common symptom of a brain tumor and occur in about 50 percent of the patients, according to the American Cancer Society (ACS). It should be noted that the generalized symptoms of brain tumors are most commonly related to other less serious conditions. The ACS estimates that less than 1 percent of headaches are caused by brain tumors.

In addition to the generalized symptoms, a brain tumor may cause specific symptoms directly related to the location of the tumor. It can cause irritation or damage to parts of the brain that control certain functions. Specific symptoms can include:

• Seizures
• Weakness or numbness of a body part
• Difficulty with motor movements, such as walking or speaking
• Problems with thinking and communication
• Personality changes

The brain is a complex organ that controls many functions in the body. There are many additional symptoms that can occur with brain tumors. If individuals experience any of these symptoms or symptoms that interfere with normal daily functions, they should consult a physician for a medical diagnosis.