<s>[INST] Every morning my baby will wake up with vertical nystagmus and sometimes he will have an upward gaze. It started 2 weeks ago when he was sick with a cold and ear infection. He had an EEG  and the results were normal. We have an appointment to see a neurologist in two weeks. I am very concerned. What is the cause of this? [/INST] Hello, Thanks for choosing Chat Doctor for posting your query. I have gone through your question in detail and I can understand what you are going through. Many times seizure disorders can get missed in the single EEG. What is required is multiple EGGS and if possible EEG's with photic stimulation. Seizure disorder is a most likely diagnosis but occulogyric crisis is also one of the possible etiologies and this can occur as a side effect of some Chat Doctor.  Are you baby on any medications?  That needs to be checked. Your neurologist visit is certainly warranted. Hope I am able to answer your concerns. If you have any further query, I would be glad to help you. In future if you wish to contact me directly, you can use the below-mentioned link:bit.ly/ </s>