Upper back pain—or, discomfort that can occur anywhere ... A strain can develop suddenly or over time and cause pain, ...

Back pain can vary in location, severity, and the type of pain a person experiences. For example, muscular pain may feel achy, tight, or like a spasm. Nerve pain may cause stabbing, burning ...

This may cause muscles to tighten and spasm throughout your shoulders and upper back. How To Reduce Upper Back Pain During ...

A back spasm occurs when the muscles in the ... suddenly and range from a mild ache to intense, crippling pain. The muscles in the upper, middle, and lower back are categorized into three types ...

shoulder and upper back muscles causes these muscles to tear (on a microscopic level). Your body tries to prevent this tearing by forcing these muscles to knot up. This results in muscle spasms.