<s>[INST] Hi- This is urgent. My niece does this thing- it has happened four times in a year now- She will be normally playing or sitting or eating, and all of a sudden her body turns all pale- her lips are completely white and she goes unresponsive- she is awake and her eyes are open but her breathing becomes shallow and her mom and I blow in her nose which makes her take deep breaths untill emergancy assistance arrives. Then after about 15 minutes she snaps out of it. Today her MRI results came back normal, her EEG was also normal. What is going on?? What other steps can we take to get to the bottem of this scary problem?? [/INST] Hi, Is the episode preceded by excessive sweating / blurring of vision / nausea? In this setting, two other possibilities to be ruled out are cardiogenic syncope and neural syncope. The former can be ruled out with an ECG. In neural syncope, this happens after prolonged / sudden standing, especially when deny Chat Doctor.  Your doctor will guide through this Hope I have answered your question. Let me know if I can assist you further.  </s>