Year: 2017 Source: Health & Social Work. (2017). 42(3): 183–186. doi.org/10.1093/hsw/hlx029 SIEC No: 20170553

Many chronic, invisible illnesses that involve chronic pain—fibromyalgia, complex regional pain syndrome, postural orthostatic tachycardia syndrome, and myalgic encephalomyelitis—can greatly affect both physical and mental health