Middle back pain affects the thoracic spine—the ... difficulty moving, bruising, and muscle spasms. This type of pain occurs due to injury, such as abrupt, awkward, and twisting motions or ...

Hemifacial spasm (HFS) is a neurological disorder manifested by twitching on one side of the face due to involuntary contractions of the eyelid and other facial muscles. It usually begins gradually ...