Think about the last time you felt angry, sad, or blissful. Chances are, your mental state had something to do with an interaction with another person—a sister, a boyfriend, a co-worker, a parent.

Marriage and family therapists believe interpersonal relationships have a profound impact on people, and that most mental health issues can be understood and treated by considering a person's system of relationships. Therefore, families, spouses, and partners are all part of marriage and family therapy (MFT).

"Work and school productivity, health, and well-being all stem from having decent family relationships," says Gregory Brock, PhD, LMFT (licensed marriage and family therapist), director of the University of Kentucky Family Center. If you have personal problems, Dr. Brock says, changing patterns in your interpersonal life can help fix them.

"Families really contribute to issues with individuals," agrees Maureen Davey, PhD, LMFT. "All individual problems must be considered in context." MFT seeks to examine the context of problems within a family and find a way for everyone in the family to deal with those problems.

Being married or having a typical family unit (if there is such a thing) is not a prerequisite for MFT. While families and married couples are often seen in MFT, extended families, work groups, and groups of close friends are all MFT candidates. And Dr. Brock strongly recommends a few sessions for couples contemplating marriage.

"No relationship works perfectly," Dr. Brock says. "[MFT] can help you to understand what is working well and what needs work."

Dr. Davey agrees. "Being aware of the things you will struggle with as a couple can help you deal with hot points when they come up," she explains. This helps prevent those hot points from becoming destructive.