Seizures, Headaches, Dizziness, and More

By Lisa Fayed 

 Medically reviewed by Nicholas R. Metrus, MD

Dizziness can sometimes be an early sign of a tumor. This may be the case, for example, with children who have a pineal gland tumor deep within the brain.¹ Headaches, too, are common in both adults and children diagnosed with a brain tumor, but headaches are not the only symptom of a brain tumor.²

Signs of a brain tumor can range from mild and subtle to severe and life-threatening and may include vomiting, seizures, balance problems, personality changes, loss of consciousness, and more. Symptoms like dizziness also may vary depending on the location of the tumor and the mechanism, such as increased intracranial pressure.³

This article discusses brain tumor symptoms, including areas of the brain where tumors occur and some differences between children and adults. It explains why you should need to see a healthcare provider for symptoms.

Illustration by Verywell

Common Brain Tumor Symptoms

Many brain tumor symptoms overlap with the symptoms of other conditions. It's important to understand a specific symptom within a pattern of signs and your overall health.

Apart from dizziness, some of the most common brain tumor symptoms include:⁴

• Seizures

• Headaches

• Vomiting

• Cognitive changes like memory issues

• Loss of consciousness

• Personality changes

• Vision and hearing problems

• Loss of balance

• Speech changes

Certain symptoms may be specific to the location of the tumor. A pineal gland tumor, for example, may limit the ability to look up. Hormonal changes, like leaking breast milk, can arise from a pituitary tumor.⁴

Seizures

Seizures can occur prior to a brain tumor diagnosis, and are often the first symptom of a brain tumor.

A 2019 study of 678 people diagnosed with brain tumors found seizures to be the most common sign in nearly half (45.9%) of the cases.⁵ This sign of a brain tumor is early in the diagnostic process and contributes to how a brain tumor may be treated.

Headaches

Roughly half of all people with brain tumors experience headaches; in fact, data on young people with brain tumors puts the number at 60%.²

Brain tumor headaches tend to be dull and persistent, with throbbing headaches occurring less often. They are often worse in the morning, when pressure on your brain is increased while sleeping, but get better throughout the day.⁶

Additional symptoms, like vomiting, are often present. Pain may also worsen with:

• Physical activity, such as bending forward

• Sneezing or coughing

• Bearing down while having a bowel movement 

These headaches may cause pain all over or pain that's worse on one side of the head. The amount of time a brain tumor headache will last also varies from a few hours to a few days, but a consistent headache requires medical attention. So does neck pain, which is more often associated with spinal tumors.

Signs of an Emergency

• The worst headache you've ever had

• A severe headache while pregnant or after giving birth

• A severe headache with an impaired immune system due to chemotherapy, HIV/AIDS, or another condition

• Sudden severe pain on only one side of your head

• A fever along with a severe headache

• A gut feeling that something is seriously wrong

Vomiting

Vomiting, especially in the morning, with or without nausea, can be a symptom of a brain tumor.⁷

Vomiting due to a brain tumor is often triggered by an abrupt change in position, such as rolling over in bed.

Cognitive Changes

Brain tumors can affect many thinking and problem-solving skills.⁷ Sometimes these changes can be subtle, and a person who has a brain tumor may be able to keep their job or function socially, but something just might be a bit "off."

Cognitive changes caused by brain tumors include:

• Memory: Forgetfulness or slowed processing of information might not be alarming at first, but can worsen over time as the tumor grows.

• Problem-solving: Tasks such as doing simple math, writing sentences, setting up a chessboard, or following a recipe may become challenging.

• Concentration: A person may become more easily distracted and have problems staying on task. It may take longer to complete basic tasks than usual.

• Confusion: Symptoms can vary from mild confusion, such as not understanding the nuances of a conversation, to more extreme symptoms, such as not recognizing why routine events are happening.

• Spatial problems: Problems with spatial perception may cause clumsiness, or a previously good driver may have a car accident due to changes in depth perception.

Loss of Consciousness

Increased intracranial pressure can cause loss of consciousness for a few reasons:

• It can cause progressive fatigue, leading to unconsciousness.

• Pressure on the brainstem can cause sudden loss of consciousness and may progress to a coma. 

In many cases, the loss of consciousness occurs along with other symptoms, such as seizures or vomiting.³

Personality or Mood Changes

Adults who have brain tumors sometimes experience personality changes.⁷ They may laugh at inappropriate times, have a sudden increased interest in sex, throw temper tantrums, become paranoid, or engage in risky behaviors.

Symptoms of a brain tumor have also been known to mimic depression. Other mental health conditions, as well as injuries to the brain through trauma or stroke, can cause these changes.

Vision and Hearing Problems

Some brain tumors can cause visual or auditory (hearing) disturbances.⁷

Problems with vision can include seeing flashing lights, double vision, blurring, or loss of vision that's typically in one eye or one part of your vision (visual field). Hearing changes can include one-sided hearing loss or ringing in the ears.

A brain tumor can cause the pupil in one eye to become dilated (widen) while the other remains a normal size. This symptom is considered an emergency.

Loss of Balance

Brain tumors may cause weakness on one side of the body or face, clumsiness, loss of balance, or stumbling.⁷ Some of these brain tumor symptoms are similar to those that occur with stroke.

An abnormal gait can develop, affecting the way you walk, and coordinated movements may become difficult. Trouble with swallowing may also be a symptom, though it can occur with other conditions including Parkinson's disease or multiple sclerosis.

Dizziness

Dizziness with a brain tumor is not uncommon, with people reporting the symptom in cases of primary brain tumors as well as those that have spread to the brain.⁸ In some cases, dizziness can occur with benign cysts as well.⁹

In other cases, people report dizziness and other side effects from treatments for brain tumors.¹⁰

Dizziness, like headaches and problems with coordination, can be an early warning sign of a brain tumor but in most cases it's an indirect symptom.¹¹

Hackensack Meridian Health. 7 Warning Signs of a Brain Tumor.

 It also can be associated with a number of health conditions including temporary conditions like ear infections or dehydration, and chronic illnesses like Meniere's disease or low blood sugar episodes with diabetes.

Speech Changes

Slurring of words or difficulty speaking clearly can occur.⁷ A person who has a brain tumor may have difficulty forming or finding words, say things that make very little sense, or not be able to understand what others are saying. 

Benign and Malignant Brain Tumors

Brain tumors can be benign (noncancerous) or malignant (cancerous). The main difference is that benign brain tumors tend to grow more slowly than malignant brain tumors, and malignant tumors are more likely than benign tumors to recur after they have been removed. The symptoms of benign and malignant tumors are very similar.

What Causes Brain Tumor Symptoms?

Brain tumor symptoms are associated with the part of the brain where a tumor is growing. They also can develop due to increased intracranial pressure (pressure in and around the brain).

For example, you may experience changes in vision if the tumor is in an area of the brain that controls vision. A tumor in the area of the brain that controls balance may result in lack of coordination.⁴

Increased intracranial pressure can produce a range of symptoms that affect areas of the brain near the brain tumor, but it can also affect areas of the brain that are located relatively far from the brain tumor.

Symptoms by Tumor Location

Sometimes symptoms are very specific to the location in the brain where the tumor is located.¹²

Frontal Lobe Tumors

The frontal lobes are in the area of the brain where thinking and judgment take place. Tumors in this area can cause an intellectual decline as well as a change in personality.

Pressure on the olfactory nerve may result in a loss of the sense of smell (anosmia). The ability to speak may also be impaired (expressive aphasia).

The posterior (back) part of the frontal lobe controls strength on the opposite side of the body, so a tumor in this area can cause weakness on the opposite side of the body.

Temporal Lobe Tumors

The temporal lobes are involved in speaking and hearing.¹³ Tumors in this area can result in auditory hallucinations (hearing things), an inability to understand speech (receptive aphasia), and vision changes.

Symptoms such as deja vu experiences, depersonalization, and perceiving things as either larger or smaller than they really are may also occur.

Parietal Lobe Tumors 

A tumor in the parietal lobe at the top of the brain can cause changes in sensation on the opposite side of the body. This area of the brain is also important for coordinating different parts of the brain, and tumors may cause problems with orientation (like knowing up from down) or object recognition.

People with a tumor in this region may ignore one side of their body or experience spontaneous pain.

Occipital Lobe Tumors 

The occipital lobes at the back of the brain are involved in vision. Symptoms can vary from visual hallucinations to visual field defects (only seeing one or more sections of peripheral vision) to cortical blindness (vision loss despite a perfectly functioning eye).

Cerebellar Tumors

The cerebellum at the lower back of the brain is responsible for balance and coordination. Tumors in this region may cause a lack of coordination similar to that associated with being drunk.

These tumors also can cause difficulty with fine motor skills, such as writing or brushing teeth.

Brainstem Tumors

Dizziness can occur with a brainstem tumor.¹⁴ The brainstem is the relay station between the upper part of the brain and the spinal cord, and it also controls vital functions such as breathing and heart rate.

Other brainstem tumor symptoms include:

• Double vision

• Uneven pupils

• Numbness or weakness on one side of the body

• Droopy eyelids

Loss of consciousness may also occur, and a brain tumor in this region can be fatal. Tumors in the upper regions of the brain may cause pressure that results in brain tissue herniation, meaning the tissue is displaced and pushed into brain structures.¹⁵

Pituitary Gland Tumors 

Tumors in or around the pituitary gland (such as a craniopharyngioma) may result in changes in energy level, menstrual irregularities, abnormal lactation (production of milk), and weight changes.

These tumors can also compress the optic nerves, leading to vision changes.

Tumor Symptoms in Children

Signs and symptoms of brain tumors in children are often the same as those in adults.¹⁶

Some additional symptoms that can affect children include:

• Irritability

• Incontinence

• Appetite changes

• Not reaching age-appropriate developmental milestones

• Behavior changes

• Turning the whole head to see something instead of moving the eyes

In infants, the fontanelles (soft spot on the skull where the plates have not yet closed) may bulge, and the baby may become fussy when their head is touched. 

Complications

Complications are often associated with tumor enlargement, but even a small tumor can have detrimental effects if it is near structures in the body that control vital functions. 

Complications of brain tumors include:

• Increased intracranial pressure: Because the skull is an enclosed, inflexible space, a growing brain tumor can lead to pressure on other areas of the brain. As brain tissue is physically squeezed, it can lose function or be pushed down toward or into the upper spinal cord. Herniation can cause dilated pupils, rapid breathing, an irregular heartbeat, and may cause death very quickly if not urgently treated.¹⁷

• Hydrocephalus: Often, a brain tumor obstructs the flow of fluid in the ventricles, the spaces where fluid flows. When this occurs, intracranial pressure increases, and symptoms of confusion, vision impairment, and loss of consciousness arise. Sometimes, the ventricular obstruction cannot be relieved, so fluid must be removed; often, a ventriculoperitoneal shunt must be placed.  

• Disruption of vital functions: When brain tumors affect the brainstem, they can interfere with breathing, heartbeat, and blood pressure, causing sudden, dangerous changes in these vital functions. This may cause a sudden emergency or even death. 

When to See a Healthcare Provider

When symptoms that may indicate a brain tumor don't go away or worsen, it's important to see a healthcare provider. They can assess and diagnose the condition, in some cases after ordering tests such as magnetic resonance imaging (MRI) of the brain.

Keep in mind that many symptoms, like headache or dizziness, occur with far less serious health issues. You may not have a brain tumor, but other symptoms (like new-onset seizures or vision problems) need to be diagnosed and treated right away.

This is also true if you or a loved one experiences a change in mental status, difficulty breathing, or one-sided weakness often seen with stroke. In most cases, you can call your healthcare provider to talk about your symptoms. They will tell you if you should go to the emergency room or make an appointment for an office visit.

Summary

Dizziness, headache, seizure, and other symptoms can be caused by a brain tumor, although there are many other reasons why you might experience them. It's often a pattern of symptoms that makes a brain tumor the more likely diagnosis.

The symptoms also change depending on where a tumor is located. Dizziness, for example, may be linked to a brainstem tumor, while hearing might be affected by a temporal lobe tumor.

Contact your healthcare provider if you have symptoms you think might be caused by a brain tumor. It's important to have an accurate diagnosis and discuss your treatment options.

18 Sources

Prasetio AD, Irsalina P, Islamiyah WR, Ardiansyah D. Neuro-otology symptoms as the early sign in pediatric patient with a pineal gland tumor: a case report. Radiol Case Rep. 2022 Jun 23;17(9):3051-3054. doi:10.1016/j.radcr.2022.06.001.

Zumel-Marne A, Kundi M, Castaño-Vinyals G, Alguacil J, Petridou ET, Georgakis MK, et al. Clinical presentation of young people (10-24 years old) with brain tumors: results from the international MOBI-Kids study. J Neurooncol. 2020 Apr;147(2):427-440. doi:10.1007/s11060-020-03437-4.

Sorribes IC, Moore MNJ, Byrne HM, Jain HV. A Biomechanical Model of Tumor-Induced Intracranial Pressure and Edema in Brain Tissue. Biophys J. 2019 Apr 23;116(8):1560-1574. doi:10.1016/j.bpj.2019.02.030. 

American Society of Clinical Oncology. Brain Tumor: Symptoms and Signs.

Akeret K, Serra C, Rafi O, Staartjes VE, Fierstra J, Bellut D, et al. Anatomical features of primary brain tumors affect seizure risk and semiology. Neuroimage Clin. 2019;22:101688. doi:10.1016/j.nicl.2019.101688.

Memorial Sloan Kettering Cancer Center. When Is a Headache a Symptom of a Brain Tumor? Very Rarely.

Armstrong TS, Vera-bolanos E, Acquaye AA, Gilbert MR, Ladha H, Mendoza T. The symptom burden of primary brain tumors: evidence for a core set of tumor- and treatment-related symptoms. Neuro-oncology. 2016;18(2):252-60. doi:10.1093/neuonc/nov166

Choi MG, Lee JH, Lee MS, Suh SJ, Lee YS, Kang DG. Primary Gliosarcoma with Extracranial Metastasis. Brain Tumor Res Treat. 2020 Apr;8(1):53-56. doi:10.14791/btrt.2020.8.e9. 

Kim E. Cerebellar Glioependymal Cyst. Brain Tumor Res Treat. 2021 Apr;9(1):31-34. doi:10.14791/btrt.2021.9.e6. 

Kusakabe K, Inoue A, Watanabe H, Nakamura Y, Nishikawa M, Ohtsuka Y, et al. Perioperative perampanel administration for early seizure prophylaxis in brain tumor patients. Surg Neurol Int. 2023 Aug 11;14:287. doi:10.25259/SNI_495_2023.

Hackensack Meridian Health. 7 Warning Signs of a Brain Tumor.

Madhusoodanan S, Ting MB, Farah T, Ugur U. Psychiatric aspects of brain tumors: A review. World J Psychiatry. 2015;5(3):273-85. doi:10.5498/wjp.v5.i3.273

Yamamoto AK, Sanjuán A, Pope R, Parker Jones O, Hope TMH, Prejawa S, et al. The Effect of Right Temporal Lobe Gliomas on Left and Right Hemisphere Neural Processing During Speech Perception and Production Tasks. Front Hum Neurosci. 2022 May 16;16:803163. doi:10.3389/fnhum.2022.803163.

American Brain Tumor Association. Signs & Symptoms.

Gurjar HK, Mishra S, Garg K. Contralateral Ventriculostomy for Intraoperative Brain Relaxation in Supratentorial Brain Tumors. Neurol India. 2020 Jan-Feb;68(1):159-162. doi: 10.4103/0028-3886.279710.

Lanphear J, Sarnaik S. Presenting symptoms of pediatric brain tumors diagnosed in the emergency department. Pediatr Emerg Care. 2014;30(2):77-80. doi:10.1097/PEC.0000000000000074

Esquenazi Y, Lo VP, Lee K. Critical Care Management of Cerebral Edema in Brain Tumors. J Intensive Care Med. 2017;32(1):15-24. doi:10.1177/0885066615619618

American Association of Neurological Surgeons. Brain Tumors: Type of Brain Tumors.

Additional Reading

American Cancer Society. Signs and Symptoms of Adult Brain and Spinal Cord Tumors

American Cancer Society. Signs and Symptoms of Brain and Spinal Tumors in Children

National Cancer Institute. Childhood Brain and Spinal Tumors Treatment Overview (PDQ). December 2016.

Ropper. Adams and Victor's Principles of Neurology, 10e. McGraw-Hill; 2014.

By Lisa Fayed
Lisa Fayed is a freelance medical writer, cancer educator and patient advocate.

‍