Hypoglycemia, dehydration, acetaldehyde intoxication, and vitamin B12 deficiency are all theorized causes of symptoms. It may last up to two or three days.The term was originally a 19th century expression describing unfinished business—something left over from a meeting—or ‘survival.’ In 1904, the meaning that we now associate first surfaced.Dehydration, fatigue, headache, nausea, vomiting, diarrhea, flatulence, weakness, elevated body temperature, hypersalivation, difficulty concentrating, sweating, anxiety, irritability, sensitivity to light and noise, erratic motor functions (including tremor), trouble sleeping, severe hunger, and lack of depth perception are the visible symptoms. Ther no "proven-remedies" though many have their insightful opinions on it. What am I talking about?? Ans- Hangover. Cracks- Sairam Aviral Chitananda Aman Anonymous