Earlier this year a family member of mine sustained a concussion. What seemed like an innocuous event, turned into a six month ordeal, with multiple doctors’ visits, scans, and emotional variability. As I did more research I found that of course concussions can have a physical impact, but they can also result in significant mental and emotional challenges. Here is what I discovered after reviewing this website and reading the references at the end of this article.
The Impact On Mental Health
Most people have heard of a concussion, but do we really know what it is? A concussion is actually a type of mild traumatic brain injury (TBI) that can occur after a blow, bump, or jolt to the head or body causes the brain to move rapidly within the skull. Many people recover from a concussion within days or weeks, however some experience symptoms that persist for months or longer. These symptoms include headaches, dizziness, and difficulty concentrating. In addition, research shows that a concussion and other mild traumatic brain injuries can be associated with mental health difficulties, such as depression, anxiety, irritability, sleep problems, post-traumatic stress symptoms, and other psychological problems.
The Connection
What is the connection between concussions and mental health? What actually happens? A concussion can injure and affect the parts of the brain involved in attention, emotion, sleep, and behavior. At the same time, the circumstances surrounding an injury can create psychological stress. For example, someone who is injured in an accident, sports, a fall, or other event may experience fear or emotional distress in addition to the physical effects of the injury. The relationship between concussions and mental health is complex. Not everyone who experiences a concussion will have mental health symptoms or develop a mental health disorder, and psychological symptoms can have multiple causes. Below are some of the common mental health problems that develop in those who sustain a concussion or TBI.
Depression
Depression is one of the mental health problems that can occur following a traumatic brain injury. A person who develops depression after a concussion may experience persistent sadness, loss of interest in activities, low motivation, fatigue, changes in sleep or appetite, feelings of worthlessness, or difficulty concentrating.
A systematic review of traumatic brain injury research found that depressive disorders are relatively common after a TBI. The review estimated that the prevalence of depressive disorders was approximately 17% during the first year following a TBI, compared with 13% before the injury. The researchers also found that rates could remain elevated over longer periods.
Depression can also interact with physical concussion symptoms. For instance, fatigue and sleep difficulties may make it harder to participate in normal activities, and the desire to withdraw from school, work, exercise, or social activities can contribute to low mood. This can create a cycle in which physical and psychological symptoms reinforce one another, making it difficult to progress.
Anxiety
Anxiety may also occur after a concussion. Someone may become unusually worried about their symptoms, their recovery, returning to sports or work, or experiencing another injury. Physical symptoms such as dizziness, headaches, rapid heartbeat, or difficulty sleeping can sometimes increase feelings of anxiety.
Research suggests that anxiety disorders are more common among people who have experienced a TBI than in the general population. A systematic review found an estimated anxiety-disorder prevalence of about 21% during the first year after a TBI, with substantial variation between research studies.
Importantly, having anxiety or depression before an injury may also influence recovery. A 2025 study found that a pre-existing history of anxiety or depression was associated with greater odds of experiencing persistent post-concussion symptoms.
Irritability And Mood Changes
Concussions affect people differently. Some experience increased irritability, frustration, emotional sensitivity, or mood swings. These changes can be difficult for the person experiencing them and for family members, friends, and coworkers.
Mood changes may be related to several factors, including changes in brain functioning, pain, fatigue, poor sleep, difficulty concentrating, and frustration with limitations caused by the injury. Someone who normally manages school, work, sports, or social responsibilities may become frustrated when these activities temporarily become more difficult. Even something that may seem so easy, such as walking the dog, can be interrupted by a concussion and cause frustration.
Because these symptoms can resemble or occur alongside psychological disorders, healthcare professionals should consider the individual’s overall symptoms and circumstances rather than assuming that every mood change is caused directly by the brain injury.
Post-Traumatic Stress
A concussion sometimes occurs during a frightening or traumatic event. In these circumstances, a person may experience symptoms of post-traumatic stress disorder (PTSD), such as intrusive memories, nightmares, avoidance, heightened alertness, or persistent fear.
The concussion itself and the traumatic event that caused it are related but different. A person can develop PTSD because of the traumatic experience even if the physical brain injury is mild. Conversely, a person can experience psychological symptoms following a concussion without meeting the diagnostic criteria for PTSD. It can be confusing and that is why there may be a need for different health care professionals to be involved.
Sleep, Concentration, And Emotional Well-Being
Sleep and cognitive symptoms can have a major effect on mental health. After a concussion, some people experience difficulty falling asleep, excessive sleepiness, fatigue, memory problems, or difficulty concentrating.
These symptoms can affect everyday functioning. A student may struggle to complete assignments, an employee may have difficulty performing familiar work tasks, and an athlete may feel frustrated about being unable to participate in their sport at the level they used to. Simple household chores may not be as simple or easy anymore. These changes can lead to social isolation, stress, and reduced confidence.
The relationship also works in the opposite direction: poor sleep, anxiety, and depression can make cognitive and physical symptoms feel worse. Consequently, concussion recovery often requires attention to both physical symptoms and psychological well-being.
Recovery
Recovery from a concussion varies considerably. Some people recover quickly, while others develop persistent post-concussion symptoms. A concussion is a genuine neurological injury, and mental health symptoms can be part of a complex interaction between neurological, physical, psychological, and social factors.
Research suggests that psychological and social factors can influence recovery. A history of anxiety or depression, for example, has been associated with increased odds of persistent symptoms after concussion. Other factors, including the severity and circumstances of the injury, sleep problems, social circumstances, and the presence of ongoing physical symptoms may also contribute.
Treatment And Support
Recognizing mental health symptoms after a concussion is important because they can be treated. Healthcare professionals may assess mood, anxiety, sleep, cognitive functioning, substance use, and other factors when symptoms persist.
Treatment depends on the individual’s needs. It may include education about concussions, gradual return to normal activities, treatment of sleep problems or physical symptoms, psychological therapy, cognitive rehabilitation, or medication when clinically appropriate.
Research on interventions after a concussion suggests that cognitive rehabilitation and certain psychological or neurocognitive interventions may improve mental health and well-being for some people. Most importantly, people should not feel that they have to manage psychological symptoms alone. Persistent sadness, severe anxiety, major behavioral changes, or significant difficulties functioning after a concussion are reasons to speak with a healthcare professional.
Particular attention should be given to severe depression, significant behavioral changes, substance-use problems, or thoughts of self-harm or suicide. Clinical guidelines specifically recommend assessing people with a TBI for psychiatric disorders and suicidality when appropriate. If someone is in immediate danger or experiencing a mental health crisis, emergency services or an appropriate crisis service should be contacted.
Conclusion
A concussion can affect much more than physical health. Depression, anxiety, irritability, sleep difficulties, and post-traumatic stress symptoms may occur after a concussion and can interfere with school, work, relationships, and quality of life. The connection between concussion and mental health is complex: neurological changes, physical symptoms, the circumstances of the injury, previous mental health history, and social factors can all influence recovery.
Recognizing psychological symptoms as a legitimate part of concussion recovery can help people receive appropriate support. Early identification and treatment of mental health difficulties may improve overall well-being and help individuals return to their normal activities. Concussion recovery should therefore be viewed as a whole-person process that addresses both brain health and mental health.
References
- U.S. Department of Veterans Affairs & U.S. Department of Defense. (2021). VA/DoD Clinical Practice Guideline for the Management and Rehabilitation of Post-Acute Mild Traumatic Brain Injury.
- Scholten, A. C., Haagsma, J. A., Cnossen, M. C., Olff, M., van Beeck, E. F., & Polinder, S. (2016). Prevalence of and risk factors for anxiety and depressive disorders after traumatic brain injury: A systematic review. Journal of Neurotrauma, 33(22), 1969–1994.
- Cnossen, M. C., Scholten, A. C., Lingsma, H. F., et al. (2017). Predictors of major depression and posttraumatic stress disorder following traumatic brain injury: A systematic review and meta-analysis. Journal of Neuropsychiatry and Clinical Neurosciences, 29(3).
- Tracey, A. J., Bateman, A. G., Baez, S. E., & Covassin, T. (2023). Effectiveness of interventions for the improvement of mental health and well-being post-concussion: A systematic review. Brain Injury.
- McIntosh, S. J., Vergeer, M. H., Galarneau, J.-M., Eliason, P. H., & Debert, C. T. (2025). Factors associated with persisting symptoms after concussion in adults with mild TBI: A systematic review and meta-analysis. JAMA Network Open, 8(6), e2516619.
