Substance use — whether it’s alcohol, tobacco, or drugs — is often a way of coping with an unresolved problem. The same is true of behaviors such as problem gambling and bingeing and purging. A psychologist can help address both the problem behavior and its root cause, whether it’s stress, depression, or childhood experiences. Psychologists also provide support for family members dealing with a loved one’s addiction. Individual and group therapy can help family members and caregivers better understand how best to support their loved one’s recovery while also coping with their own feelings.