Mental illness refers to medical conditions that disrupt thinking, mood, and behavior. Some common mental illnesses include anxiety disorders, depression, bipolar disorder, schizophrenia, and others. Mental illnesses are treatable medical conditions that can affect people of any age, race, or background. Signs and symptoms vary depending on the illness but may include changes in mood, sleep, appetite, concentration, and social withdrawal. Treatment involves medication, therapy, support groups, and lifestyle changes tailored to the individual. Recovery is promoted through awareness, seeking help, and maintaining treatment.