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Traumatic Brain Injury (TBI): What It Is, Symptoms & Treatment

Locations: AdvertisementAdvertisement A traumatic brain injury (TBI) happens when a hit to the head or an object injures your brain. They range from mild to severe and may affect your thinking, movement or emotions. It can cause headaches, confusion or memory

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A traumatic brain injury (TBI) happens when a hit to the head or an object injures your brain. They range from mild to severe and may affect your thinking, movement or emotions. It can cause headaches, confusion or memory loss. Treatment options are available to help you recover.

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A traumatic brain injury (TBI) happens when an outside force damages your brain and affects how it works. This can occur after a fall, a hard hit to your head, a vehicle accident or when something goes through your skull.

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Symptoms can affect your body, thinking and emotions. You may have headaches, confusion, short-term memory loss, and mood or behavior changes. TBIs may be life-threatening. They can cause short-term or long-term health problems that affect many parts of your daily life.

Treatment is available and depends on how serious the injury is.

There are two types:

  • Penetrating TBI: This is when something pierces your skull, enters your brain tissue and damages a part of your brain. Healthcare providers may call these open TBIs.
  • Blunt TBI (closed head TBI): This is when something hits your head hard enough that your brain bounces or twists around inside your skull.

Healthcare providers classify traumatic brain injuries as being mild, moderate or severe. They may use the term “concussion” when talking about mild TBI. Providers typically group moderate and severe TBIs together.

  • Mild TBI: More than 75% of all TBIs are mild. But even mild TBIs may cause significant and long-term issues. For example, you may have trouble returning to your daily routine, including being able to work.
  • Moderate and severe TBI: These are medical emergencies. Many develop into significant and long-term health issues.

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Symptoms vary depending on the severity. Any TBI can cause physical symptoms, problems with thinking or memory, and social or emotional changes.

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Mild TBI symptoms can appear right away or develop over days. You may not always connect your symptoms to the injury. Symptoms can also change as your brain heals.

Physical problems may include:

  • Nausea or vomiting
  • Dizziness or balance problems
  • Headaches
  • Light sensitivity
  • Fatigue
  • Blurred vision

Thinking or memory symptoms may include:

  • Confusion
  • Trouble concentrating
  • Difficulty thinking clearly
  • Short-term memory loss
  • Feeling “slowed down”
  • Grogginess

Social or emotional changes may include:

  • Anxiety
  • Nervousness
  • Irritability

Sleep changes may include:

  • Trouble falling asleep
  • Sleeping less than usual
  • Sleeping more than usual

These symptoms can be more serious and may also change over time.

Physical symptoms may include:

  • Passing out for more than 30 minutes (moderate) or more than 24 hours (severe)
  • Coma
  • Weakness in your arms or legs
  • Problems with balance or coordination
  • Hearing or vision problems
  • Changes in touch or other senses

Thinking or memory problems may include:

  • Confusion
  • Trouble concentrating
  • Difficulty thinking clearly
  • Short-term memory loss
  • Trouble communicating
  • Grogginess

Social or emotional symptoms may include:

  • Anxiety or nervousness
  • Irritability, anger or aggression
  • Depression
  • Trouble managing behavior
  • Being more impulsive

Children and adults often have similar symptoms. But babies may show different signs. TBI signs in babies may include:

  • Problems eating or nursing
  • Crying that’s hard to soothe

Brain damage causes a TBI. A hard hit to the head can make your brain move, bounce or twist inside your skull. This movement can injure brain tissue and blood vessels. A foreign object entering your skull can also cause damage.

Common causes of a penetrating TBI may include:

  • A sharp object, like shrapnel
  • A bullet
  • A knife

Common causes of non-penetrating TBIs may include:

  • Vehicle accidents
  • A fall
  • A hit in the head
  • A sports injury
  • An explosion

Mild, moderate and severe TBIs can lead to different complications.

If you have a mild TBI and don’t give your brain time to heal, you have a higher risk of second-impact syndrome. This is a life-threatening condition where your brain suddenly swells after a second injury.

Moderate or severe TBIs can cause long-term problems, like:

  • Brain bleeding
  • Seizures
  • Permanent brain damage and disability
  • Shorter life expectancy

If you have a mild TBI, a healthcare provider will examine you and ask about your symptoms. They’ll also want to know how the injury happened. They may order:

  • A neurological exam
  • Imaging tests (CT scan or MRI)
  • Blood tests

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If you have a moderate or severe TBI, your provider will likely do blood tests and a CT scan right away. These help them decide on the immediate care you need.

Treatment depends on whether the TBI is mild, moderate or severe. Your specific care plan will vary based on your symptoms and overall health.

If you have a mild traumatic brain injury, healthcare providers may recommend:

  • Rest
  • Over-the-counter non-NSAID pain relievers
  • Regular check-ups to watch for new or worsening symptoms

Your provider will let you know how often check-ups should be.

A moderate or severe traumatic brain injury is a medical emergency. Healthcare providers may need to do surgery to:

  • Relieve pressure inside your skull.
  • Remove debris from a penetrating injury.
  • Remove blood clots.
  • Repair skull fractures.
  • Place monitors to measure pressure and oxygen levels in your brain.

Providers may prescribe medications, including:

  • Prescription pain medicines
  • Antiseizure medications
  • Medication to prevent blood clots (venous thromboembolism)
  • Stimulants to increase alertness
  • Antidepressants
  • Anti-anxiety medications

After surgery, you may need rehabilitation. This helps you recover daily skills and manage thinking, communication or emotional changes. Rehabilitation may include:

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  • Physical therapy
  • Occupational therapy
  • Speech therapy
  • Respiratory therapy
  • Mental health support

If you have a TBI, get help right away if you have:

  • A headache that doesn’t go away or gets worse
  • Vomiting that doesn’t stop
  • Slurred speech

Care at Cleveland Clinic

Recovery looks different for everyone. All traumatic brain injuries can create challenges, and some may lead to long-lasting effects. Your provider can explain what to expect based on your specific injury.

A traumatic brain injury (TBI) can change everything in an instant — whether it’s from a fall, a crash or a blow to the head. Some symptoms might show up right away, while others may slowly surface days or even weeks later. That unpredictability can feel scary, especially when it affects your memory, emotions or ability to think clearly.

What’s important to know is that even mild TBIs deserve attention. Giving your brain the time and care it needs to heal is key. And for more serious injuries, the right treatment and therapy can support your recovery over time. If you’re unsure whether symptoms are related to a TBI, trust your intuition and reach out to a provider.

Healing from a brain injury is a process, and it often takes patience, care and the right team around you.

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Cleveland Clinic’s health articles are based on evidence-backed information and review by medical professionals to ensure accuracy, reliability and up-to-date clinical standards.

Cleveland Clinic’s health articles are based on evidence-backed information and review by medical professionals to ensure accuracy, reliability and up-to-date clinical standards.

  • Alzheimer’s Association (U.S.). Traumatic Brain Injury (TBI) (https://www.alz.org/alzheimers-dementia/what-is-dementia/related_conditions/traumatic-brain-injury). Last updated 10/22/2019. Accessed 12/16/2025.
  • American Association of Neurological Surgeons. Traumatic Brain Injury (https://www.aans.org/patients/conditions-treatments/traumatic-brain-injury/). Last updated 2/3/2020. Accessed 12/16/2025.
  • Centers for Disease Control and Prevention (U.S.). Facts About TBI (https://www.cdc.gov/traumatic-brain-injury/data-research/facts-stats/index.html). Last updated 8/4/2025. Accessed 12/16/2025.
  • National Institute of Neurological Disorders and Stroke (U.S.). Traumatic Brain Injury (https://www.ninds.nih.gov/health-information/disorders/traumatic-brain-injury-tbi). Last updated 7/21/2025. Accessed 12/16/2025.

Traumatic brain injuries can be serious or life-threatening. Cleveland Clinic’s experts provide fast treatment to give you the best chance of recovery.

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Related questions

01How Are Brain Damage and Brain Injuries Treated?

Anyone who has a head or brain injury needs immediate medical attention. A brain injury that seems mild -- referred to as a concussion -- can be as dangerous as clearly severe injuries. The key factor is the extent and location of the damage. Brain injury does not necessarily result in long-term disability or impairment. But the correct diagnosis and treatment is needed to contain or minimize the damage. The extent and effect of brain damage is determined by a neurological exam, neuroimaging testing such as MRI or CT scans, and neuropsychological assessments. Doctors will stabilize the patient to prevent further injury, ensure blood and oxygen are flowing properly to the brain, and ensure that blood pressure is controlled. Almost all patients will benefit from rehabilitation to assist in long-term recovery. That may include:

Source: www.webmd.com ↗
02How Can Brain Damage Be Treated?

While there is no standard treatment for reversing brain damage, there are a few different therapies that have demonstrated efficacy in a handful of patients. Hyperbaric oxygen therapy, which uses higher-than-atmospheric pressure oxygen to treat disease, has been demonstrated to be effective in helping traumatic brain injury. In one case, it nearly completely reversed the brain injury of a 2-year-old girl who drowned in a swimming pool. Other research has suggested that lifestyle changes and supplements can also be effective in reversing the effects of chronic trauma in football players. In one study, scientists tested the effectiveness of a brain-health protocol that included weight loss, fish oil, and a supplement that included nutrients that enhance blood flow. After six months, the study subjects were found to have improved cognition and cerebral blood flow. Some newer, more experimental treatments are also currently being researched. In one new study, researchers at the University of California experimented with the use of a memory-enhancing drug on mice with brain injury. The researchers found that after four daily doses of the drug, concussed mice were able to perform memory-related tasks as well as their non-concussed counterparts. The drug hasn't been prepared for human trials yet, but researchers are hopeful it could be used to treat TBI in the future. Future research could offer more potential treatment options. For example, some scientists hope to soon test the effectiveness of pharmaceuticals that prevent the growth of hyaluronic acid fragments, which have been identified as a potential "bad actor" that may lead to some of the most severe physical deficiencies associated with brain damage.

Source: www.news-medical.net ↗
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