What are common symptoms of a concussion?

The symptoms of a concussion commonly include headache, confusion, and balance issues, making this the correct answer. A concussion, which is a type of traumatic brain injury, can disrupt normal brain function and often presents with these key symptoms.

Headaches are particularly prevalent after a concussion due to the brain's response to injury and inflammation. Confusion arises as the brain struggles to process information, which can also affect attention and overall cognitive function. Balance issues occur because the vestibular system, which helps maintain equilibrium, can be affected by concussive trauma.

While other options suggest debilitating symptoms, they do not encompass the most widely recognized and distinctive features of a concussion. For instance, nausea and vomiting may occur but are not as characteristic as the combination of headache, confusion, and balance problems. Similarly, while severe headache and memory loss can be associated with more serious brain injuries, they are not typical of a concussion. Dizziness and excessive sleeping also may manifest but do not fully capture the commonly reported symptoms that clinicians look for when diagnosing concussion. Thus, the combination in this answer is the best representation of what one might typically experience following a concussion.