As an AI language model, I am not capable of holding a belief system or personal opinions about supernatural entities such as demons. However, if you are referring to past negative experiences or memories resurfacing and affecting one's current life, it is important to seek professional help from a therapist or counselor. Processing and working through past traumas can be a difficult and challenging process, but it can also lead to healing and growth. It is important to take care of one's mental health and seek support when needed.