Will not nurse or eat. Concussion Signs and Symptoms. Responding to Concussion. Danger Signs. Severe Brain Injury. Recovery from Concussion. Returning to School. Returning to Sports. Brain Injury Safety and Prevention. Get Involved. Get Email Updates. That's why anyone who experiences a brain injury needs monitoring in the hours afterward and emergency care if symptoms worsen. Second impact syndrome. Rarely, experiencing a second concussion before signs and symptoms of a first concussion have resolved may result in rapid and usually fatal brain swelling.
It's important for athletes never to return to sports while they're still experiencing signs and symptoms of concussion. Wearing protective gear during sports and other recreational activities.
Make sure the equipment fits properly, is well maintained and is worn correctly. Follow the rules of the game and practice good sportsmanship. When bicycling, motorcycling, snowboarding or engaging in any recreational activity that may result in head injury, wear protective headgear. Concussion care at Mayo Clinic. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
This content does not have an English version. This content does not have an Arabic version. Overview A concussion is a traumatic brain injury that affects your brain function. Request an Appointment at Mayo Clinic. Types of concussion injuries Open pop-up dialog box Close. Types of concussion injuries Common injuries that cause concussions include falls or other direct hits to the head, car accidents and blast injuries from explosions.
Share on: Facebook Twitter. Show references Evans RW. Acute mild traumatic brain injury concussion in adults. Accessed Nov. Sprouse RA, et al. Sport-related concussion: How best to help young athletes.
The Journal of Family Practice. Recovery from concussion. Centers for Disease Control and Prevention. Symptoms of traumatic brain injury TBI. What is a concussion? Meehan WP, et al. Concussion in children: Management. Accessed Jan. Schutzman S. Minor head trauma in infants and children: Evaluation.
Giza CC, et al. Summary of evidence-based guideline update: Evaluation and management of concussion in sports: Report of the Guideline Development Subcommittee of the American Academy of Neurology.
McCrory P, et al. Heavy rains cause areas of damage to bridges and roads, making them impassable for a time. After the storm, the waters recede, but not all the roads are usable without repairs. The changes in your brain from PCS can cause different physical, emotional, and cognitive symptoms, depending on which regions are affected.
For example, in some patients, the region of the brain that governs smell processing is affected. Another system that can be disrupted by concussion is your autonomic nervous system ANS. The ANS governs all the automatic processes that go on in your body, such as breathing, blood pressure, heartbeat, and even aspects of digestion.
In many post-concussion patients, the part of the ANS which controls the fight or flight response your sympathetic nervous system is overactive, and the part that helps things calm down your parasympathetic nervous system is underactive. Dysregulation of the ANS can cause problems with blood flow vasculature , breathing, heart rate, digestion, and many other processes. Sometimes, patients report nausea after exercising. Usually, it shows up during exercise or sometimes even light physical activity, although a few patients have nausea one or two hours after.
So why does it happen? ANS dysregulation can disrupt healthy breathing patterns. As a result, carbon dioxide builds up in their lungs, increasing blood acidity which, incidentally, can also affect how your blood vessels constrict and dilate. Cerebral autoregulation is the process that controls the blood pressure in your head. And having too much or too little blood in your brain will cause problems. One of them could be nausea based on some research on acute mountain sickness. Your vestibular system, primarily located in the inner ear, is involved in balance.
It works along with your brain and your eyes to determine where your body exists in 3D space relative to everything around it.
It also communicates with the brain and the ANS to dictate positional blood flow dynamics i. Sometimes, patients experience changes to the digestion process as a result of significant ANS dysregulation. One effect of this, which is linked to PCS headaches, is increased blood in the head and, consequently, decreased blood in the stomach and liver. As a result, your meals might not move through your GI tract at the right speed, resulting in symptoms like constipation or diarrhea.
Filtering of the blood by the liver could also be affected, leading to less detoxification and decreased production of chemicals that help digest food.
We also suspect that the influence of the ANS on the GI tract could result in new food sensitivities. There are still other issues that could influence your nausea. For example, some people ask if stress can make you nauseated. The answer is yes, under certain conditions. If your ANS is already dysregulated, stress can increase the severity of your resulting symptoms by aggravating it further. Stress is often more of a contributing factor to an existing or underlying issue than a direct cause, however.
Often, nausea is not an isolated symptom. Here are some of the most common combinations and what might be causing them. Note: Just keep in mind that this list is not a replacement for medical advice from visiting a health care provider with experience in concussion and post-concussion syndrome diagnosis. An upset autonomic nervous system can result in gut inflammation, so you may experience nausea or other symptoms after eating certain foods especially if you are developing new food sensitivities.
Try to include antioxidants in your diet to help calm things down a bit. These specific symptoms are often situation dependent. Since these are all common symptoms of concussion and post-concussion syndrome, they could arise from any of the situations described in the previous section.
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