The headaches and dizziness are a RESULT of the brain being overloaded. When the brain is overloaded, it is injured more and takes longer to heal. It's like if you run with a knee injury then it's going to hurt because the knee is being overexerted and you will injure it more.

It was always hard to explain the pain level and dizziness to the doctor because I felt fine sitting around the house, but if I went out and did things or worked on the computer then I felt dizzy and my head would hurt for a week.