There’s no single behavior that makes someone “an alcoholic.” The medical term used today is alcohol use disorder (AUD), and it’s diagnosed when a person meets at least 2 out of 11 specific criteria within the same 12-month period. Nearly 28 million people ages 12 and older in the United States had AUD in 2024, which means roughly 1 in 10 people qualify. Many of them don’t fit the stereotype of someone whose life has visibly fallen apart.
The 11 Criteria That Define Alcohol Use Disorder
The current diagnostic standard uses 11 questions about your drinking patterns over the past year. You don’t need to meet all of them. Meeting just 2 puts you in the mild category. Here’s what clinicians look for:
- Drinking more or longer than you intended
- Wanting to cut down or stop, or trying to, but being unable to
- Spending a lot of time drinking or recovering from its effects
- Craving alcohol so strongly you can’t think of anything else
- Drinking interfering with responsibilities at home, work, or school
- Continuing to drink despite problems it causes with family or friends
- Giving up or cutting back on activities you once enjoyed in order to drink
- Drinking in situations where it’s physically dangerous (like driving)
- Continuing to drink despite knowing it’s causing or worsening a physical or mental health problem
- Needing more alcohol to get the same effect (tolerance)
- Experiencing withdrawal symptoms when the alcohol wears off
The number of criteria you meet determines severity. Two to three qualifies as mild AUD. Four to five is moderate. Six or more is severe. This spectrum matters because many people assume you need to be at rock bottom to “count.” You don’t.
How Severity Levels Differ in Practice
Someone with mild AUD might regularly drink more than they planned and have tried unsuccessfully to cut back, but still hold a steady job and maintain relationships. Someone with moderate AUD typically starts seeing consequences ripple outward: friction with a partner, declining performance at work, dropping hobbies they used to love. Severe AUD usually involves physical dependence on top of the behavioral signs, meaning the body has adapted to alcohol so thoroughly that stopping abruptly is dangerous.
These categories aren’t fixed. AUD tends to progress over time without intervention, and mild cases can become severe ones.
What Tolerance and Withdrawal Actually Mean
Two of the 11 criteria deal with physical changes in the body, and they’re worth understanding on their own because they signal that the brain and liver have structurally adapted to regular drinking.
Tolerance happens through two mechanisms. First, the brain reduces the number of receptors that alcohol acts on, so the same amount of alcohol produces a weaker effect. Second, the liver starts producing more of the enzymes that break alcohol down, clearing it from your system faster. The result is that you need noticeably more drinks to feel the way two or three used to make you feel. Many people interpret growing tolerance as a sign they can “handle their liquor.” It’s actually a sign the body is working harder to compensate for a chemical it’s being exposed to too often.
Withdrawal is what happens when someone who has developed physical dependence stops drinking or sharply reduces their intake. Milder symptoms include anxiety, insomnia, headache, nausea, sweating (especially on the palms and face), and shakiness. These typically start within hours of the last drink. More severe withdrawal can include seizures, usually within the first 12 to 48 hours, and in serious cases, a condition called delirium tremens, which involves hallucinations, confusion, fever, and rapid heart rate. Delirium tremens symptoms most often appear 48 to 96 hours after the last drink, though they can be delayed by up to 10 days. This is why people with heavy, long-term drinking histories should not quit cold turkey without medical guidance.
Signs That Don’t Look Like the Stereotype
Roughly 20% of people with AUD in the United States are what’s sometimes called “high-functioning.” They hold steady jobs, earn good incomes, and appear to have their lives together. This makes the disorder easy to miss, both for the person drinking and for those around them.
The behavioral signs tend to be subtle. Drinking alone or in secret. Using alcohol specifically to manage stress or emotions. Setting personal limits on drinking and repeatedly breaking them. Making casual excuses like “it’s been a long day.” Joking about alcoholism in a way that deflects real conversation. Getting irritable or defensive when someone brings up their drinking.
There are also social patterns that serve as quiet red flags. Avoiding events where alcohol won’t be available, like morning gatherings, family outings, or dry venues. Overperforming at work as if to prove everything is under control. Hiding bottles in unusual places. Gradually pulling away from friends who don’t drink. About one-third of high-functioning individuals have a family history of alcoholism, and about half also smoke, which suggests a broader pattern of using substances to cope.
Over time, even high-functioning AUD tends to erode relationships. Partners notice emotional distance, unpredictable moods, and broken promises to cut back. Children in the household may feel anxious or responsible for a parent’s behavior. Colleagues may pick up on inconsistent performance or lapses in judgment. The “functioning” part is often a stage, not a permanent state.
What Heavy Drinking Does to the Body Over Time
Long-term heavy alcohol use raises the risk of several cancers. Any amount of alcohol increases the risk of breast cancer in women, and higher consumption raises the risk of cancers of the mouth, throat, esophagus, liver, and colon. Beyond cancer, chronic heavy drinking contributes to high blood pressure, heart disease, stroke, liver disease, and digestive problems. It weakens the immune system, making you more susceptible to infections. It can also cause or worsen depression, anxiety, and memory problems, including dementia.
These aren’t risks reserved for the most extreme drinkers. Many of them increase along a gradient, meaning the more you drink and the longer you drink, the higher the risk climbs.
How to Gauge Where You Stand
If you’re wondering whether your drinking qualifies, a useful starting point is a screening tool called the AUDIT-C, which is the method recommended by major health organizations. It asks just three questions: how often you drank in the past year, how many drinks you typically had on days when you drank, and how often you had six or more drinks on a single occasion. Higher scores indicate a greater likelihood that alcohol is affecting your health.
An older tool called the CAGE questionnaire (which asks about cutting down, annoyance at criticism, guilt, and needing an eye-opener drink) is still widely known, but health authorities no longer recommend it for screening. It only catches people who are already experiencing serious consequences and misses many who would benefit from earlier intervention.
For context on what counts as a concerning drinking pattern: binge drinking is defined as five or more drinks for men, or four or more drinks for women, in about two hours. You don’t need to binge drink to have AUD, but regular binge drinking is a strong signal.
What Treatment Looks Like
Treatment for AUD exists on a spectrum that matches the disorder’s own severity levels. At one end, outpatient treatment involves regular therapy sessions while you continue living at home and going to work. Intensive outpatient programs add more hours per week. Residential treatment means living at a treatment facility for a period of weeks or months. The most intensive level is medically managed inpatient care, typically reserved for people whose withdrawal symptoms or co-occurring health conditions require close medical supervision.
The right level of care depends on several factors: how severe your withdrawal risk is, whether you have other physical or mental health conditions, how stable your living situation is, and what level of support exists in your daily environment. Treatment decisions are based on individual need rather than arbitrary prerequisites like having already failed at a previous attempt. Someone with mild AUD and a strong support network might do well with outpatient counseling alone. Someone with severe physical dependence may need medically supervised detox before any other treatment can begin.