Is there any way to tell the difference between concussion and a hangover if i fell down drunk?

Duration of symptoms: The difference is the duration of symptoms. The symptoms of a hangover should resolve quickly, within a day. On the other hand, symptoms of a concussion can take much longer to resolve. However, these persistent symptoms can be subtle. As you recover from a concussion, you may experience symptoms during exercise or physical exertion. Be on the lookout for these.