It exists as a reality of any relationship, and is not necessarily bad. In fact a relationship with no apparent conflict may be unhealthier than one with frequent conflict. Conflicts are critical events that can weaken or strengthen a relationship. Conflicts can be productive, creating deeper understanding, closeness and respect, or they can be destructive, causing resentment, hostility and divorce. How the conflicts get resolved, not how many occur, is the critical factor in determining whether a relationship will be healthy or unhealthy, mutually satisfying or unsatisfying, friendly or unfriendly, deep or shallow, intimate or cold.
Conflicts run all the way from minor unimportant differences to critical fights.
There are conflicts of needs, wants, preferences, interests, opinions, beliefs and values. Many people prefer to give in rather than struggle through the conflict. Some people get mad and blame the other person. Others are competitive and have to win. They use their power and influence to control and get their way.