Mental illness is a broad term for many conditions that affect your mood, thinking, and behavior. It’s a common condition, affecting up to 1 in 5 adults in the United States each year. Symptoms can vary depending on the disorder, including feeling sad or down, confused thinking, excessive worry or fear, extreme mood swings, and difficulty coping with everyday life.
Various factors, including genetics, brain chemistry, and life experiences, can cause mental illness. Mental illness is often treatable with a combination of medication and therapy. With early diagnosis and treatment, most people with mental illness can live full and productive lives.