Strange Side Effects of Alcohol You’ve Never Heard Before, Says Science

Strange Side Effects of Alcohol You’ve Never Heard Before, Says Science

Saying and doing stupid things, running your car into a ditch (or worse), DUI, regrettable Tweets, painful dance moves, hangovers.

Those are just a few of the common ugly side effects of drinking alcohol of which you’re aware, maybe even from personal experience. We can go on: weight gain, substance abuse, belly fat, etc. But science points to many others that may surprise you.

This round’s on us. And for more on all things booze, don’t miss out on these Side Effects of Giving Up Alcohol, According to Science. Plus, if you’re looking for more healthy tips, check out Eating Habits to Lose Abdominal Fat As You Age, Say Dietitians.

It sounds scientific, but you’re likely already familiar with nocturnal enuresis; it’s more commonly referred to as bedwetting. A full bladder can work like a nagging alarm on your smartphone, forcing you to get up to pee. But you can ignore your body’s “I gotta go” signals, especially when you’ve had too much to drink. Alcohol suppresses an antidiuretic hormone that prompts your kidneys to conserve water so, when you drink, your body makes more urine. Booze also irritates the bladder, according to the National Continence Association. Say you had a rum and Coke; both alcohol and caffeine are known to trigger the detrusor muscle in the bladder to contract, triggering you to pee even before your bladder is full. The end result may be wet jammies if your alcohol-induced “coma” is stronger than your desire to get up and go to the bathroom.

While you can be allergic to beer, most people simply have a sensitivity to some of the ingredients in it. “The most common reactions to beer are to types of grains, modified grain proteins hops, yeast, molds or barleys,” writes Cleveland Clinic physician Mark Rood, MD, in Health Essentials. “Sensitivities are also possible to the additives that are present in some beers, including sulfites, sodium benzoate, or tartrazine.”

Sulfites, histamines, yeast, tannins, and egg whites (sometimes used as a filtering agent) are also common triggers of allergy- or asthma-like reactions, according to the American College of Allergy, Asthma & Immunology. In a survey in the German journal Deutsches Arzteblatt International, 8.9% of women and 5.2% of men reported intolerance and/or allergy-like symptoms after drinking wine. The most common symptoms included flushing, itching, and nasal congestion.

This is a serious condition brought on by a high intake of alcohol, primarily beer, five or more cans per day, and a poor diet. It’s a type of hyponatremia occurring when the concentration of sodium in the blood is abnormally low, according to case studies in the open-access medical journal Cureus. Sodium is a critical electrolyte that helps regulate the amount of water in and around your cells. It’s often very low in hospitalized patients with a history of alcoholism. Symptoms of “Beer Potomania” include confusion, fatigue, headache, nausea, and muscle weakness.

Related: What Happens to Your Body When You Drink Beer Every Night

You might think a nightcap of good cognac might help you nod off—and it just might—but you can pay for it in the wee hours. Alcohol, even just one drink late at night, can disrupt deep sleep, the most rejuvenating stage that occurs in the final stage of non-REM sleep. A large Finnish study of more than 4,000 people published in JMIR Mental Health found that moderate alcohol consumption (two drinks per day for men and one or women) decreased sleep quality by 24% while men and women who drank heavily (more than two a day for men and more than one for women) experienced poorer sleep quality by 39.2%. Alcohol is a short-acting sedative, meaning 2 to 3 hours after blood alcohol concentrations fall close to zero, a rebound occurs, and arousal is spurred. Since it takes about an hour for the body to metabolize one glass of wine or liquor, if you have a few late at night, your deep sleep will be disrupted just when you need it most. The takeaway: stop drinking alcohol at least 4 hours before bedtime, suggests a 2009 review of studies in Substance Abuse. For more tips on getting a better night of sleep, check out 7 Healthy Diet Changes That Help You Sleep.

Alcohol dilates blood vessels in the face and especially the nose, aggravating a condition known as rosacea in some people. But heavy drinking doesn’t cause so-called “alcoholic’s red nose,” the enlarged, bulbous rosacea subtype. Even teetotalers can have rosacea, says the National Rosacea Society. But many rosacea sufferers note that alcohol, red wine, in particular, exacerbates flare-ups. Red wine contains histamine-like compounds called tyramine, a known vasodilator. In a survey of 700 patients by the National Rosacea Society, 76% reported skin reactions after drinking red wine. Beer triggered red noses in 41% of respondents; Scotch elicited the fewest flare-ups, 21%. At least some good can come of red wine, however: 12 Surprising Health Benefits of Red Wine.

Taking a nip of brandy from a flask while skiing may warm your cold alpine soul, but it doesn’t last long. As we’ve learned above, alcohol is a vasodilator, boosting the volume of blood in the capillaries under the surface of your skin. That creates the sensation of warmth while your core temperature may actually be lowering, which could be dangerous if you don’t realize how cold your body is becoming. In addition, drinking alcohol can reduce your body’s ability to shiver, its naturally warming response to cold temperatures, according to a study by the Army Research Institute of Environmental Medicine published in the Journal of Wilderness Medicine.

Alcohol can be thought of as a poison, and it can trigger a host of changes to your digestive system that may lead to a sprint to the nearest toilet. Here’s how: according to a report in Addiction Biology, alcohol is inflammatory. This means that drinking alcohol causes irritation to the gastrointestinal tract while disrupting the normal water-pulling function of the large intestine, which results in liquid stools. Alcohol also overaccelerates digestion and kills good gut bacteria, both of which can contribute to diarrhea in binge drinkers as well as chronic alcoholics. For more, see 25 Unhealthiest Habits for Your Digestion.

Not surprising, but worth highlighting: many studies show that mood disorders like anxiety and depression are the most common mental health problems that occur with alcohol use disorder. And when you suffer from both depression and alcoholism, the prognosis is worse than if you have either disorder alone.

You’re not fooling anyone with a shot of peppermint schnapps. A night of drinking can give you oral malodor—bad breath. A study in the Journal of Dental Research suggests alcohol intake and being overweight is associated with high volatile sulfide levels, a measure of bad breath.

Bad dreams are common in alcohol-dependent patients during abstinence and withdrawal, according to a study in Alcohol and Alcoholism. Researchers surveyed a group of alcoholics and a group of healthy people about their sleep and dream experiences over four weeks while the drinkers were abstaining from alcohol. Results showed that the alcoholics experienced impaired sleep quality and their dreams tended to be more negatively toned than those of the healthy subjects. A common theme in the dreams of the detoxifying alcoholics: Alcohol.

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