Hangover dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — Dream Explanations - Anonymous

Dreams of a hangover represent exhaustion as you burn the candle at both ends; you are dealing with the consequences for ingesting information or the overindulgence of non-supportive people or habits in your life.

It is time for some changes in your lifestyle.

See Drunk and Alcohol.

Source: Strangest Dream Explanations Author: Dream Explanations - Anonymous

Interpretation 2 — myjellybean

To dream that you have a hangover suggests that you are heading in the wrong direction. You need to utilize your mind more, and not let your emotions get out of control.
Source: My Dream Interpretation Author: myjellybean

Interpretation 3 — Stearn Robinson - Tom Corbett

For single people this dream is a warning against promiscuous sex relations; for married ones it portends a relief from family worries.
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett