- The most common cause of this disorder is that the person has been deserted by someone, either by choice or by death. But such an experience could definitely seed the fear of being left alone in his mind.
- It is also seen that leaving a child alone in a room, as a form of punishment or in jest, can lead to the development of this fear in him. However, this may not always be the case.
- Another reason could be the memory of the discomfort the person may have faced when left alone (in a particular situation).
Being a psychological disorder, this fear may arise for several other reasons as well, which may be different for different people. Nonetheless, these are the most common ones.