Traumatic Brain Injury: Symptoms
According to the National Institute of Neurological Disorders and Stroke (NINDS), a person with a mild traumatic brain injury may either remain conscious or experience a brief loss of consciousness for a few seconds or minutes. Other symptoms include:

• Headache
• Confusion
• Lightheadedness
• Dizziness
• Blurred vision or tired eyes
• Ringing in the ears
• Bad taste in the mouth
• Fatigue or lethargy
• Change in sleep patterns
• Behavioral or mood changes
• Trouble with memory, concentration, attention, or thinking

A person with a moderate or severe TBI may show these same symptoms, but may also present with:

• Headache that gets worse or does not go away
• Repeated vomiting or nausea
• Convulsions or seizures
• Inability to awaken from sleep
• Dilation of one or both pupils of the eyes
• Slurred speech
• Weakness or numbness in the extremities
• Loss of coordination
• Confusion, restlessness, or agitation