This accumulated pain is a negative energy field that occupies your body and mind. If you look on it as an invisible entity in its own right, you are getting quite close to the truth. It's the emotional pain-body. It has two modes of being: dormant and active. A pain-body may be dormant 90 percent of the time; in a deeply unhappy person, though, it may be active up to 100 percent of the time. Some people live almost entirely through their pain-body, while others may experience it only in certain situations, such as intimate relationships, or situations linked with past loss or abandonment, physical or emotional hurt, and so on. Anything can trigger it, particularly if it resonates with a pain pattern from your past. When it is ready to awaken from its dormant stage, even a thought or an innocent remark made by someone close to you can activate it.
— Eckhart Tolle