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Sudden unconsciousness with peeing or involuntary urination suggests a seizure activity.
Seizures will also cause biting on tongue or lips. So that is also consistent.
You should see your doctor today or go to the ER for further evaluation. Seizure can be due to the metabolic disorders ( acidosis), stroke, brain tumor or aneurysm, heart arrhythmias, sometimes unknown causes. Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star on top).Please bookmark my profile for fast, reliable authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/