Hangover refers to the unpleasant symptoms that develop 4 to 6 hours after a person drinks too much alcohol.

Symptoms may include:

• Nausea, vomiting, and stomach pain.
• Headache, tiredness, and irritability.
• Sweating and thirst.
• Weakness and shaky hands.

A hangover is an indication of drinking too much alcohol. If a person has frequent hangovers, it could be a sign of an alcohol use problem.