Spinal fluid (thin, water-looking liquid) coming out of the ears or nose

Loss of consciousness; however, loss of consciousness may not occur in some concussion cases

Dilated (the black center of the eye is large and does not get smaller in light)or unequal size of pupils

Vision changes (blurred vision or seeing double, not able to tolerate bright light, loss of eye movement, blindness)

Dizziness, balance problems

Respiratory failure (not breathing)

Coma (not alert and unable to respond to others) or semicomatose state

Paralysis, difficulty moving body parts, weakness, poor coordination

Slow pulse

Slow breathing rate, with an increase in blood pressure

Vomiting

Lethargy (sluggish, sleepy, gets tired easily)

Headache

Confusion

Ringing in the ears, or changes in ability to hear

Difficulty with thinking skills (difficulty “thinking straight”, memory problems, poor judgment, poor attention span, a slowed thought processing speed)

Inappropriate emotional responses (irritability, easily frustrated, inappropriate crying or laughing)

Difficulty speaking, slurred speech, difficulty swallowing

Body numbness or tingling

Loss of bowel control or bladder control