Why do I get diarrhea the day after drinking alcohol?
Dec 30, 2021
Source: Cainiu Health
Dr. Zhang Mingping
Introduction
1. Chronic alcohol consumption: If diarrhea consistently occurs after drinking alcohol over a prolonged period, it is advisable to reduce both the quantity and frequency of alcohol intake.
2. Colitis: Patients with colitis are particularly susceptible to alcohol-induced diarrhea—especially after consuming baijiu (Chinese distilled liquor)—due to heightened intestinal sensitivity and inflammation.
3. Drinking tea after alcohol: Consuming tea following alcohol intake may trigger diarrhea because ethanol in alcoholic beverages can irritate the gastrointestinal tract, and tea—particularly strong or unfermented varieties—may further stimulate intestinal motility and exacerbate this effect.
Diarrhea following alcohol consumption is relatively common and generally considered normal. Adequate rest and appropriate use of hangover-relief medications (e.g., “Jiejiu Ling”) usually provide effective symptom relief. However, if frequent diarrhea occurs the day after drinking, it may indicate gastrointestinal damage and cause significant discomfort. So, what causes diarrhea the day after alcohol consumption? Below, we address this question.
What Causes Diarrhea the Day After Drinking Alcohol?
1. Chronic Alcohol Consumption
Diarrhea after drinking is most commonly observed among individuals with long-term alcohol use. Prolonged alcohol intake often damages the gastrointestinal tract. In severe cases, such damage may lead to gastrointestinal disorders—including gastric diseases—of which diarrhea is a common symptom. Therefore, individuals experiencing recurrent post-alcohol diarrhea should consider reducing both the quantity and frequency of alcohol consumption.
2. Presence of Colitis
Individuals who rarely drink but consistently develop diarrhea after even small amounts of alcohol should consider the possibility of undiagnosed colitis. Alcohol exposure can readily trigger diarrhea in patients with colitis—especially after consuming strong spirits like baijiu—often worsening symptoms. Many people remain unaware they have colitis until alcohol consumption precipitates gastrointestinal distress or exacerbates underlying disease. Thus, infrequent drinkers experiencing post-alcohol diarrhea are advised to seek medical evaluation, including gastrointestinal examinations.
3. Drinking Tea After Alcohol
Many people believe drinking tea after alcohol helps alleviate hangover symptoms. However, consuming tea post-alcohol is itself a known contributor to diarrhea. This occurs because ethanol in alcohol is metabolized by the liver into acetic acid, which is incompletely oxidized and further broken down. When tea is consumed during this metabolic process, compounds in tea may interact with acetic acid, triggering diarrhea. Consequently, drinking tea after alcohol not only fails to relieve intoxication but may provoke adverse gastrointestinal reactions.
4. Inappropriate Food Pairings
It is common to consume snacks or barbecued foods while drinking. However, diarrhea following alcohol intake may also stem from inappropriate food combinations. Especially in summer, people frequently pair beer with grilled foods and raw seafood (e.g., oysters), a combination highly likely to induce diarrhea. Even pairing beer with other foods may provoke diarrhea due to individual gastrointestinal intolerance. Therefore, mindful attention to food–alcohol pairings is essential when drinking.
The above outlines potential causes of diarrhea occurring the day after alcohol consumption. We hope this information proves helpful.
