2A decreased pain threshold
Apart from any other existing disease, there’s a sensory alteration in the brain chemistry, and it has been described in the scientific literature as a decreased threshold to pain and other stimuli. In other words, patients become hypersensitive to pain sensation, and what is often perceived as simple touch or mild pressure sometimes triggers excruciating pain. Thus, these patients are extremely vigilant and increase their awareness of uncomfortable sensations, which psychologically adds up to their hypersensitivity.
The patient typically has an increased sensitivity to many types of stimuli, including heat, cold, touch, and even smell. What people would perceive as a normal sensation that doesn’t trigger pain, is perceived by them as nociceptive sensations (pain). In this regard, it is important to understand that most sensations can be perceived as pain when they are excessively intense. Excessive heat or excessive cold, excessive pressure, and pain itself have varying degrees of intensity, and all of them can be either mild or become unbearable. Fibromyalgia patients have a very low pain threshold. In other words, mild sensations are perceived as intense and trigger unbearable pain. It is not a subjective feeling, and patients are not faking. There is an actual increase in excitatory neurotransmitters that we can actually measure and demonstrate in these patients.