Alcohol use disorder (which includes a level that's sometimes called alcoholism) is a pattern of alcohol use that involves problems controlling your drinking, being preoccupied with alcohol, continuing to use alcohol even when it causes problems, having to drink more to get the same effect, or having withdrawal symptoms when you rapidly decrease or stop drinking. Different health risks include:
Accidents and injuries
Heart disease and cardiovascular health
Osteoporosis
Malnourishment and vitamin deficiencies
Brain damage
Immune system dysfunction
Ulcers and gastrointestinal problems
Cancer
Pancreatitis
Liver disease