I have been wondering about what could happen if an EEG is done improperly. I had one done about 7 years ago to see if I had an underlying problem that caused depression. I was lying there on the table and the medical personell were hooking me up to the electrodes. I heard one of them say, " this one is not working, let's override it" I had a bad headache after it was all over with. I told one of the nurses and she said, " you should'nt feel anything." I still have the headaches occassionally. They are on the right side of my head. Could I have some damage from this?