The causes of<unk>  are not fully documented or understood. At least one study rules out trigger points: "The theory of<unk>  <unk>  caused by trigger points (TrPs) ... has been refuted. This is not to deny the existence of the clinical phenomena themselves, for which scientifically sound and logically plausible explanations based on known neurophysiological phenomena can be advanced." Some systemic diseases, such as connective tissue disease, can cause<unk> . Poor posture and emotional disturbance might also instigate or contribute to<unk> .
Myofascial pain syndrome
Arthritis
Complex regional pain syndrome
Giant cell arteritis
Calpainopathy
Psychogenic pain
Myofascial trigger point
Nerve compression syndrome