Alcohol Abuse Health Center

12 Health Risks of Chronic Heavy Drinking

Dementia

As people age, their brains shrink, on average, at a rate of about 1.9% per decade. That's considered normal. But heavy drinking speeds the shrinkage of certain key regions in the brain, resulting in memory loss and other symptoms of dementia. 

Heavy drinking can also lead to subtle but potentially debilitating deficits in the ability to plan, make judgments, solve problems, and perform other aspects of "executive function," which are "the higher-order abilities that allow us to maximize our function as human beings," Garbutt says.

In addition to the "nonspecific" dementia that stems from brain atrophy, heavy drinking can cause nutritional deficiencies so severe that they trigger other forms of dementia.

Depression

It's long been known that heavy drinking often goes hand in hand with depression, but there has been debate about which came first -- the drinking or the depression. One theory is that depressed people turned to alcohol in an attempt to "self-medicate" to ease their emotional pain. But a large study from New Zealand showed that it was probably the other way around -- that is, heavy drinking led to depression.

Research has also shown that depression improves when heavy drinkers go on the wagon, Saitz says.

Seizures

Heavy drinking can cause epilepsy and can trigger seizures even in people who don't have epilepsy. It can also interfere with the action of the medications used to treat convulsions.

Gout

A painful condition, gout is caused by the formation of uric acid crystals in the joints. Although some cases are largely hereditary, alcohol and other dietary factors seem to play a role. Alcohol also seems to aggravate existing cases of gout.

High blood pressure

Alcohol can disrupt the sympathetic nervous system, which, among other things, controls the constriction and dilation of blood vessels in response to stress, temperature, exertion, etc. Heavy drinking -- and bingeing, in particular -- can cause blood pressure to rise. Over time, this effect can become chronic. High blood pressure can lead to many other health problems, including kidney disease, heart disease, and stroke.

Infectious disease

Heavy drinking suppresses the immune system, providing a toehold for infections, including tuberculosis, pneumonia, HIV/AIDS, and other sexually transmitted diseases (including some that cause infertility). People who drink heavily also are more likely to engage in risky sex. "Heavy drinking is associated with a three-fold increase in the risk of contracting a sexually transmitted disease," Rehmn says.

Nerve damage

Heavy drinking can cause a form of nerve damage known as alcoholic neuropathy, which can produce a painful pins-and-needles feeling or numbness in the extremities as well as muscle weakness, incontinence, constipation, erectile dysfunction, and other problems. Alcoholic neuropathy may arise because alcohol is toxic to nerve cells, or because nutritional deficiencies attributable to heavy drinking compromise nerve function.