Emotions are a physical quality of the pain. It doesn't mean that the patient is emotionally weak or having a breakdown. It just means that a different of the brain is being stimulated. Neuropathic pain is usually caused by a degeneration of the nervous system, i.e. that the nerves have damaged in some way. It often feels like burning or shooting pain.
Some patients describe it as electrical shocks.
It can be a harder pain to treat. In IC, the bladder is inflamed and, at times, severely irritated. We're not sure. It appears that the nerves within the bladder have become hypersensitized, perhaps by infection, urinary toxins, histamine or other substances which can irritate the bladder. Hyperalgia subsequently develops, in which the bladder becomes more sensitized and responds with high levels of pain, even if the source of the pain is mild.