Alcohol is use as a form of self-medication to manage

People may also use alcohol or drugs because of a desire to escape reality, relieve stress, forget a trauma, ease physical or emotional discomfort, manage side effects of other drugs or medications, or try and reduce symptoms of a mental illness. The term self-medicating is used when substances, drugs or alcohol, are abused to mask symptoms of a mental health issue.

Alcohol is a depressant so if someone is depressed alcohol will actually make you feel less sad almost like it reverses the depression