Research has shown that social support plays an important role in managing psychological problems. Lack of social support has been found to be one of the factors that lead to many psychological problems. One of the anti-social behaviors is introduce as social undermining. Studies show that social undermining is the opposite of social support. Social undermining is a behavior intended to hinder, over time, the ability to establish and maintain positive interpersonal relationships, work-related success, and favorable reputation. Social undermining can take on many different forms and the manner in which it negatively affects a relationship may vary as well. The first form is direct actions. Direct undermining actions are actions in which the perpetrator will excoriate, make denigrating comments about, outright reject, or belittling a person or their ideas. Other variables to social undermining such as verbal and physical forms include making derogatory remarks about a coworker or verbally slighting them and are considered an active form of undermining. The outcomes of social undermining could summarized as loneliness, boredom, aimlessness, a decline in well-being, depression, decreased self-esteem, and psychosomatic symptoms, anger, dislike, and low life quality. This causes to low satisfaction, performance, productivity, and turnover in workplace. It is noted that high levels of undermining and support from the same source were associated with negative outcomes. However, support from one source (supervisors or coworkers) appeared to only modestly attenuate the negative effects of social undermining from another sources. It seems that intervention and training in the area of negative employee relationships addressing undermining behaviors would be beneficial.