<human>:  What are the symptoms of post-concussion syndrome?
<bot>: The symptoms of post-concussion syndrome can vary depending on an individual, but may include headaches, dizziness, difficulty concentrating, irritability, memory problems, sleep disturbances, depression, and fatigue. Other less common symptoms include mood swings, sensitivity to noise or light, blurry vision, balance problems, changes in smell or taste, ringing in the ears, and increased confusion or difficulty thinking.