Allodynia

Allodynia refers to central pain sensitization (increased response of neurons) following normally non-painful, often repetitive, stimulation. Temperature change, light touching, and clothing can trigger the pain response resulting in a burning sensation often occurring after an injury to a site.

Presentation
There are three types of Allodynia, Tactile, where pain is caused by touches such as clothing touching the skin or someone lightly touching your arm; Mechanical, caused by movement across the skin such as when you dry yourself with a towel or sheets brushing against you; and Thermal, which is caused by heat or cold that is not extreme enough to cause damage to skin tissues.

Allodynia in ME/CFS and Fibromyalgia
Both ME/CFS and Fibromyalgia (FMS) patients can experience Allodynia in any one or all its forms. Although ME/CFS and FMS patients have reported Allodynia, it has not been studied in either ME/CFS and Fibromyalgia.