2. Nausea and vomiting
Nausea is a feeling of uneasiness in the stomach that can usually precedes vomiting. Vomiting is the voluntary or involuntary emptying of the stomach contents through the mouth. While nausea and vomiting are not diseases themselves, they are often the symptoms of various underlying conditions.
In the cases of a concussion, individuals may also experience some sort of nausea after the injury. Others may have vomiting accompanying nausea. Many people experience an overall feeling of sickness.
On their own, nausea and vomiting are harmless but can be indicative of a more serious condition. If vomiting continues for more than one day, individuals are advised to consult their medical health practitioner to determine the cause.