Headaches. Dizziness. Brain fog. Poor balance. Many people assume these must be signs of ongoing brain injury after a concussion. What many are unaware of is that the neck can cause these same symptoms. The neck contains joints, muscles, and sensors that constantly talk to your eyes, inner ears, and brain. When the neck is tight or irritated, your head can hurt, your balance can feel off, and your eyes can feel slow or sore.