Brain tumour symptoms
This page is about the symptoms of brain tumours. There are sections about
Brain tumour symptoms
The most common symptoms of a brain tumour are headaches and fits. But do remember that there are much more common reasons for both these symptoms. A fit can just be jerking or twitching of a hand, arm or leg. Or it may affect the whole body.
A growing tumour causes pressure inside the skull. You may hear this called raised intracranial pressure. This causes headache, sickness and drowsiness. It can also cause fits and problems with your eyes.
A brain tumour presses on the brain tissue around it. So it will affect the part of the body, or the body process, that is controlled by that part of the brain. This means that brain tumours can cause a very wide range of symptoms. Physical symptoms can include weakness or numbness in a particular part of the body, or problems with one of your senses. Brain tumours can also cause personality changes and problems with thinking, speaking, remembering or concentrating.
You can view and print the quick guides for all the pages in the about brain tumours section.
Brain tumours cause symptoms for two reasons. Firstly, because they take up space inside the skull as they grow. Secondly, they can cause specific symptoms due to their position in the brain. There is more information below about the symptoms due to brain tumours taking up space and symptoms due to the position of the tumour.
The most common symptoms of brain tumour people have when they first go to the doctor are headaches and fits (seizures). But do remember that brain tumours are rare and there are much more common reasons for both these symptoms. So if you have either of these, do go to the doctor as soon as possible. But try not to worry too much until you know what is causing the symptoms.
As the skull is made of bone, there is a fixed amount of space for the brain to take up. The growing tumour increases the pressure inside this fixed space. This is called raised intracranial pressure or raised ICP. The increase in pressure causes the following effects.
It is important to remember that headaches and sickness are very common symptoms of illness. A brain tumour is not a very likely cause if these are the only symptoms you have. But you should go to your doctor if you have any of the following symptoms.
- You are getting very bad headaches
- You have started getting headaches, but do not usually do so
- You are getting them more and more often
- You are getting headaches and sickness together
About 1 in 3 people with a brain tumour first go to their doctor with headaches. A headache caused by a brain tumour tends to be quite bad. But in some people, they can be mild at first. The headaches may last for a long time. They may be worse first thing in the morning and get better during the day. Anything that increases the pressure in your head can make the headache worse again, such as bending over, coughing and sneezing, exercising or even shouting.
With a brain tumour, feeling sick (nausea) may also be worse in the morning. You may actually be sick. You may also have hiccoughs (hiccups).
Drowsiness is usually a later symptom of a brain tumour. As the tumour grows and the pressure inside the head increases, you may sleep more than usual. Or find yourself dropping off during the day. If this is not treated, you could eventually become more difficult to wake and then become unconscious.
Raised intracranial pressure can also cause
If you are having problems with your eyes, you should see your doctor. This is particularly important if your sight seems to be failing and glasses are not helping. Other problems include blurred vision, floating shapes, tunnel vision, or a loss of vision that comes and goes. Sometimes opticians pick up these problems - it is possible to detect raised intracranial pressure through an eye examination.
Fits are one of the most common symptoms of brain tumours. About 1 in 4 people with a brain tumour have fits when they first go to their doctor. A fit can just be jerking or twitching of a hand, arm or leg. Or they may affect the whole body. Some fits just cause a moment of unconsciousness. Fits can often be controlled with anti epilepsy medicines. And if your brain tumour is successfully treated, they may stop completely. In some cases, fits continue even after successful treatment because of scar tissue left in the brain. You may then need to carry on taking anti fit medicines (anti epileptic drugs).
Having a fit is very frightening. There are many different causes of fits and it is important to go to your doctor if you have one.
To understand why a brain tumour is causing particular symptoms, it might help to read the page about the brain in this section of CancerHelp UK. It explains what the different parts of the brain do. As a brain tumour grows, it presses on the brain tissue around it. So it will affect the part of the body, or the body process, that is controlled by that part of the brain.
Here are symptoms that can be caused by tumours in different parts of the brain and the spinal cord:
|Position of the tumour||Symptoms|
|Nerves controlling sight|
It is important to remember that there are many other causes for the symptoms mentioned above. If you are worried, you should go to your doctor. They will send you to a specialist if they think there is any possibility that you could have a brain tumour.
Sometimes tumours in the frontal or temporal lobes of the forebrain can grow to quite a size with very few symptoms. In elderly people, vague symptoms of memory loss, personality changes and difficulty walking can be put down to getting older. If several symptoms like these develop over less than 6 months, it is worth checking with your doctor.
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