Many people think that infidelity is a problem related with problems of love, sex, marriage, and circumstances. They may be considered as causes of infidelity when the analysis is based on only what is seen and recognized in the consciousness. This way of approach takes speech and actions of people in infidelity as being reliable and truthful.  

Korea Institute of Psycho-education has discovered through years of research that the cause of infidelity is relationship addiction, which is a psychological disorder, and the spouse who is the victim of spouse infidelity develops post traumatic stress. It also has developed the treatment methods for relationship addiction and post traumatic stress and have been providing psycho-training programs for restoration of balanced psychology and establishment of happiness ability.

Many people around the world including psychology experts are in a sad situation where they try to overcome the issue of spouse infidelity through different solutions and coping strategies to no avail. Attempts to solve problems in inadequate ways will only aggravate individuals' conditions and lead to dire consequences in their life and the life of their loved ones. 

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The cause of infidelity is relationship addiction. It may occur involuntarily or without the person's conscious will. The husband may suddenly get addicted to the adulteress' responses, and the wife may suddenly get addicted to the adulterer's attention and consolation. This type of psychological disorder may occur acutely. They have made a wrong choice but it must be understood that they are in the state of 'addiction', which is a pathological condition. Another serious problem of spouse infidelity is that the discovery of spouse infidelity causes post traumatic stress in the victimized spouse. When general stress and wounds are at the level of -10 in a metaphorical sense, stress and wounds sensed due to post traumatic stress are at the level of -100,000 or more. The level of stress and wounds is sensed even more severely for spouses who think they have had a happy marriage. Untreated post traumatic stress worsens as time goes by making themselves and people around them unhappy. 

The husband who is in infidelity has developed addiction (an expression disorder) and intermittent explosive disorder (a perception disorder), and the wife who is in infidelity has developed addiction (an expression disorder) and hysteria (a disorder of memory of emotion). Speech and actions of spouses in infidelity are based on  psychological disorders with severe stress and wounds, so they have no ability to recognize the problem or help the victimized spouse.  

Both the spouse in infidelity and the victimized spouse must understand the nature and cause of infidelity and post traumatic stress. The victimized spouse must treat his or her own post traumatic stress, first and foremost. Treating one's own psychological disorder is the only way to restore healthy psychology and happiness for both the spouse in infidelity and the victimized spouse.