Social disorders have a variety of causes, as follows: 1, biological factors: with biological target changes, such as genetic type changes, or neurotransmitter changes; 2, psychosocial factors: some people may have been traumatized, especially in love was rejected by the other party, and then in love will have problems, and finally afraid to contact with the opposite sex, and over time will feel inferior, no self-confidence, deny themselves; 3, the Growing up environment: Many patients with social disorders, from the psychoanalytic theory, are often related to their growing up environment. These patients may have grown up with trauma, such as being verbally abused, shamed or beaten, resulting in a lack of confidence or low self-esteem in their interactions with others, and are afraid to go out with people as well as face others in adulthood. These patients may blush, be shy, have a rapid heartbeat, or even flee the scene once they speak to others.