I noticed 4 days ago that my 5 months old son sometimes shakes his head with his eyes rolling back. It occurs 7 to 9 times everyday, and lasts for 1 - 2 seconds every time. Mostly this happens when he is sleepy. Other than this abnormal behaviors, his other behaviors such as eating and playing are quite normal.
We visited a family doctor yesterday, and showed her our recorded videos of my baby's shaking-head behavior. But she told us that this is normal for a baby and as babies grow, they will exhibit some strange behaviors.
To be honest, what the doctor said did not completely reassures us. I heard of some case that a shaking-head baby who was wrongly diagnosed with chronic tympanitis developed epilepsy after he grew up.
I uploaded the videos to youtube, and hope someone could help us find out what to do next. The links to youtube videos:
With many thanks!