A brain aneurysm (AN-yoo-riz-um) is a bulge or ballooning in a blood vessel in the brain. It often looks like a berry hanging on a stem.

A brain aneurysm can leak or rupture, causing bleeding into the brain (hemorrhagic stroke). Most often a ruptured brain aneurysm occurs in the space between the brain and the thin tissues covering the brain. This type of hemorrhagic stroke is called a subarachnoid hemorrhage.

A ruptured aneurysm quickly becomes life-threatening and requires prompt medical treatment.

Most brain aneurysms, however, don’t rupture, create health problems or cause symptoms. Such aneurysms are often detected during tests for other conditions.

Treatment for an unruptured brain aneurysm may be appropriate in some cases and may prevent a rupture in the future.


Ruptured aneurysm

A sudden, severe headache is the key symptom of a ruptured aneurysm. This headache is often described as the “worst headache” ever experienced.

Common signs and symptoms of a ruptured aneurysm include:

  • Sudden, extremely severe headache
  • Nausea and vomiting
  • Stiff neck
  • Blurred or double vision
  • Sensitivity to light
  • Seizure
  • A drooping eyelid
  • Loss of consciousness
  • Confusion

‘Leaking’ aneurysm

In some cases, an aneurysm may leak a slight amount of blood. This leaking (sentinel bleed) may cause only a:

  • Sudden, extremely severe headache

A more severe rupture almost always follows leaking.

Unruptured aneurysm

An unruptured brain aneurysm may produce no symptoms, particularly if it’s small. However, a large unruptured aneurysm may press on brain tissues and nerves, possibly causing:

  • Pain above and behind an eye
  • A dilated pupil
  • Change in vision or double vision
  • Numbness, weakness or paralysis of one side of the face
  • A drooping eyelid

Seek immediate medical attention if you develop a:

  • Sudden, extremely severe headache


Brain aneurysms develop as a result of thinning artery walls. Aneurysms often form at forks or branches in arteries because those sections of the vessel are weaker.

Although aneurysms can appear anywhere in the brain, they are most common in arteries at the base of the brain.

Risk factors

A number of factors can contribute to weakness in an artery wall and increase the risk of a brain aneurysm. Brain aneurysms are more common in adults than in children and more common in women than in men.

Some of these risk factors develop over time; others are present at birth.

Risk factors that develop over time

These include:

  • Older age
  • Smoking
  • High blood pressure (hypertension)
  • Hardening of the arteries (arteriosclerosis)
  • Drug abuse, particularly the use of cocaine
  • Head injury
  • Heavy alcohol consumption
  • Certain blood infections
  • Lower estrogen levels after menopause

Risk factors present at birth

These include:

  • Inherited connective tissue disorders, such as Ehlers-Danlos syndrome, that weaken blood vessels
  • Polycystic kidney disease, an inherited disorder that results in fluid-filled sacs in the kidneys and usually increases blood pressure
  • Abnormally narrow aorta (coarctation of the aorta), the large blood vessel that delivers oxygen-rich blood from the heart to the body
  • Cerebral arteriovenous malformation(brain AVM), an abnormal connection between arteries and veins in the brain that interrupts the normal flow of blood between them
  • Family history of brain aneurysm, particularly a first-degree relative, such as a parent, brother or sister


When a brain aneurysm ruptures, the bleeding usually lasts only a few seconds. The blood can cause direct damage to surrounding cells, and the bleeding can damage or kill other cells. It also increases pressure inside the skull.

If the pressure becomes too elevated, the blood and oxygen supply to the brain may be disrupted to the point that loss of consciousness or even death may occur.

Complications that can develop after the rupture of an aneurysm include:

  • Re-bleeding. An aneurysm that has ruptured or leaked is at risk of bleeding again. Re-bleeding can cause further damage to brain cells.
  • Vasospasm. After a brain aneurysm ruptures, blood vessels in your brain may narrow erratically (vasospasm). This condition can limit blood flow to brain cells (ischemic stroke) and cause additional cell damage and loss.
  • Hydrocephalus. When an aneurysm rupture results in bleeding in the space between the brain and surrounding tissue (subarachnoid hemorrhage) — most often the case — the blood can block circulation of the fluid surrounding the brain and spinal cord (cerebrospinal fluid).

This condition can result in an excess of cerebrospinal fluid that increases pressure on the brain and can damage tissues (hydrocephalus).

  • Hyponatremia. Subarachnoid hemorrhage from a ruptured brain aneurysm can disrupt the balance of sodium in the blood supply. This may occur from damage to the hypothalamus, an area near the base of the brain.

A drop in blood sodium levels (hyponatremia) can lead to swelling of brain cells and permanent damage.

10 thoughts on “Brain Aneurysm”

    1. A brain aneurysm is a bulging area within the wall of an artery that supplies the brain. In most cases, brain aneurysms do not produce symptoms.
      In some cases, the aneurysm may cause symptoms by pushing on other areas of the brain. Depending on the size of the aneurysm and the area involved, these symptoms can include

      2.neck pain,
      3.blurred vision and speech changes.

      When a brain aneurysm ruptures, there is bleeding within the brain. Symptoms of a ruptured brain aneurysm come on suddenly and include a severe, sudden headache that is different from other headaches an individual has experienced.

    1. Hi,

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      Forty Years Of Experience In Clinical Neurology And Academic Neurology. Special Interest In Critical Care Neurology And Epilepsy

      Neuro Sciences

      Fellow, American Academy Of Neurology (2002)
      Fellow, International Medical Science Academy (1982)
      Fellow, Indian Academy Of Neurology (1996)
      Fellow, Indian Academy Of Clinical Medicine (1996)
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      Rich Experience In The Management All Types Of Neurological Disease, Special Experience In The Management Of Critical Neurological Diseases, Stroke, And Epilepsy
      The Team Chaired By Dr J M K Murthy Was The First To Start Surgery For Patients With Drug Resistant Epilepsy In The Andhra Pradesh State.
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    1. Symptoms and Signs:
      Symptoms of a brain tumor can be general or specific. A general symptom is caused by the pressure of the tumor on the brain or spinal cord. Specific symptoms are caused when a specific part of the brain is not working well because of the tumor. For many people with a brain tumor, they were diagnosed when they went to the doctor after experiencing a problem, such as a headache or other changes.

      General symptoms include:

      Headaches, which may be severe and worsen with activity or in the early morning

      Seizures. People may experience different types of seizures. Certain drugs can help prevent or control them. Motor seizures, also called convulsions, are sudden involuntary movements of a person’s muscles. The different types of seizures and what they look like are listed below:


      Single or multiple muscle twitches, jerks, spasms

      Tonic-Clonic (Grand Mal)

      Loss of consciousness and body tone, followed by twitching and relaxing muscles that are called contractions

      Loss of control of body functions, such as loss of bladder control

      May be a short 30-second period of no breathing and a person’s skin may turn a shade of blue, purple, gray, white, or green

      After this type of seizure, a person may be sleepy and experience a headache, confusion, weakness, numbness, and sore muscles.


      Change in sensation, vision, smell, and/or hearing without losing consciousness

      Complex partial

      May cause a loss of awareness or a partial or total loss of consciousness

      May be associated with repetitive, unintentional movements, such as twitching

      Personality or memory changes

      Nausea or vomiting



      Sleep problems

      Memory problems

      Changes in ability to walk or perform daily activities

      Symptoms that may be specific to the location of the tumor include:

      Pressure or headache near the tumor

      Loss of balance and difficulty with fine motor skills is linked with a tumor in the cerebellum.

      Changes in judgment, including loss of initiative, sluggishness, and muscle weakness or paralysis is associated with a tumor in the frontal lobe of the cerebrum.

      Partial or complete loss of vision is caused by a tumor in the occipital lobe or temporal lobe of the cerebrum.

      Changes in speech, hearing, memory, or emotional state, such as aggressiveness and problems understanding or retrieving words can develop from a tumor in the frontal and temporal lobe of the cerebrum.

      Altered perception of touch or pressure, arm or leg weakness on 1 side of the body, or confusion with left and right sides of the body are linked to a tumor in the frontal or parietal lobe of the cerebrum.

      Inability to look upward can be caused by a pineal gland tumor.

      Lactation, which is the secretion of breast milk, and altered menstrual periods in women, and growth in hands and feet in adults are linked with a pituitary tumor.

      Difficulty swallowing, facial weakness or numbness, or double vision is a symptom of a tumor in the brain stem.

      Vision changes, including loss of part of the vision or double vision can be from a tumor in the temporal lobe, occipital lobe, or brain stem.

      What does a headache feel like if you have a brain tumor?

      Yet other seizures may cause like experiences. Up to half of the people with brain tumors suffer from headaches. Brain tumor headaches tend to be dull and persistent, with throbbing headaches occurring less often.They may cause pain all over or that’s worse on one side of the head.

    1. Neurology is the treatment of various types of headache, epilepsy, stroke, migraine, vatyago, Parkinson, neuropathy, brain hemorrhage, and dementia. According to experts, about 10 percent of the population is suffering from some disease related to neurology. If the time is not taken care of, then later this becomes a big problem.

      Nerves or nerves (muscles) are not just the carriers of the body’s senses but are also important parts of the brain. The number of nerve patients is increasing continuously. Neurology or neurology is the area of ​​diseases related to the nervous system diseases. There are diseases such as epilepsy, headache and citis pain. Typically treatment of neurologists is required for their treatment, but if surgery is required then neurosurgeon may also have to go. Neurosurgery is necessary in the case of absence of nervous system due to drugs etc.

      Top Three Neuro Surgeons in Kolkata

      1. Dr. Dibyendu Kumar Roy
      Education : M.Ch. (Neurosurgery) – Master of Chirurgiae in Neurosurgery, MBBS – Bachelor of Medicine and Bachelor of Surgery, MS (General Surgery) – Master of Surgery in General Surgery
      Consultant/Specialist :Neurologist,Neurosurgeon

      Dr. Dibyendu Kumar Ray is a Neurosurgeon in Sarat Bose Road, Kolkata and has an experience of 25 years in this field. Dr. Dibyendu Kumar Ray practices at Rtiics Lansdowne Clinic in Sarat Bose Road, Kolkata,Rabindranath Tagore International Institute of Cardiac Sciences in Mukundapur, Kolkata and RUBY Hospital in Kasba, Kolkata. He completed MBBS from R G Kar Medical College and Hospital in 1993,MS – Neuro Surgery from POSTGRADUATE INSTITUTE OF MEDICAL EDUCATION AND RESEARCH, CHANDIGARH in 2001 and MCh – Neuro Surgery from POSTGRADUATE INSTITUTE OF MEDICAL EDUCATION AND RESEARCH, CHANDIGARH in 2006.

      He is a member of Neurological Society of India,Neurological Surgeons Society of India (NSSI) and American Association of Neurological Surgeons (AANS). Some of the services provided by the doctor are: prolapsed disc disease,Surgery for movement disorders,Surgery for pain and peripheral nerve surgery,head and spinal injuries and brain and spinal cord tumors.


      Dr. Binod Kumar Singhania is a senior most Consultant Neuro Surgeon and Spinal Surgeon attached with Apollo Gleneagles Hospital in Kolkata. He has been doing all complex spine works including C1 C2 Transpedicular Screw. A trained professional in Minimally Invasive Surgery including Microscopic and Endoscopic, he is also an expert in performing Hip Replacement Excision of Piyuitory Tumour and 3rd Ventriculoctomy of Hydrocephalus, all types of Brain Tumour Anurysm Clipping & AVM.

      Dr. Amitabha Chanda is one of the finest neurosurgeons in India. He had been topper throughout his career. He did his MBBS and Master of Surgery (M.S.) in general surgery from Medical College, Calcutta. He bagged several gold medals and prizes in his career. He stood first in M.S. examination in University of Calcutta. He did his MCh in neurosurgery from PGIMER, Chandigarh with outstanding result.

      He went to USA for higher training. He had a score of 99 percentile in USMLE. He came in contact with a number of world-renowned neurosurgeons and learnt different facets of neurosurgery from them. Prof. LaligamSekhar of The George Washington University, Washington, DC, USA, world-renowned neurosurgeon and pioneer of skull-base surgery in North America was his mentor. He also got trained by Dr. Fred Gentili of Toronto, Canada, who is another master microneurosurgeon. Besides these trainings, he was also trained by Prof. Anil Nanda, Chairman of Neurosurgery in Louisiana State University Health Center in USA. He received training in Endoscopic neurosurgery in Germany. He also came in contact with Prof. M. G. Yasargil (Man of the Century for Neurosurgery).

      He has the rare distinction of speaking in PLENARY SESSION of the conference of American Association of Neurological Surgeons in 2001. He has been an instructor in several pre-conference workshops in USA. He has been reviewer of several international and national journals like NEUROSURGERY, SKULL BASE SURGERY, SURGICAL NEUROLOGY and NEUROLOGY INDIA.

      Although he had options to stay back in USA and Canada or settle elsewhere in India he preferred to come back to Kolkata, his home city, where he wanted to serve his own people. He has an experience of over 20 years.

    1. 1.excessive exercise
      2.coffee or soda consumption
      3.straining during bowel movements
      4.intense anger
      6.sexual intercourse
      7.Autosomal dominant polycystic kidney disease (ADPKD) is an inherited condition that affects kidney function. It also produces cobweb-like, fluid-filled pockets (cysts) in brain tissue.
      The condition raises blood pressure, which weakens blood vessels in the brain and elsewhere in the body.
      8.A traumatic brain injury can tear the tissue and create what’s known as a dissecting aneurysm.
      9.A serious infection in the body can lead to an aneurysm if the infection damages the arteries.
      10.Smoking and chronic high blood pressure are also sources of many brain aneurysms.

      Treatment : Clipping and coiling are two treatment options.

      Clipping: A neurosurgeon can operate on the brain by cutting open the skull, identifying the damaged blood vessel and putting a clip across the aneurysm. This prevents blood from entering the aneurysm and causing further growth or blood leakage.

      Coiling: An interventional neurologist, neurosurgeon, or interventional radiologist can thread a tube through the arteries, as with an angiogram, identify the aneurysm, and fill it with coils of platinum wire or with latex. This prevents further blood from entering the aneurysm and resolves the problem.

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