Which condition is characterized by constant external compression and trauma?

Chronic bursitis is characterized by constant external compression and trauma, making it the appropriate choice for this question. Bursae are small fluid-filled sacs that provide cushioning between bones and tendons or muscles around joints. When a bursa becomes chronically inflamed, it often results from repeated pressure and overuse, leading to pain and limited mobility.

In contrast, osteoarthritis is a degenerative joint disease primarily influenced by age and wear-and-tear, and while it can be exacerbated by repetitive trauma, it is not primarily defined by constant external compression. Diastasis refers to the separation of muscle pairs, often seen in the abdominal muscles, typically related to pregnancy or certain physical activities, rather than a condition caused specifically by compression. Acute synovitis involves inflammation of the synovial membrane and usually occurs suddenly in response to injury or infection, rather than as a result of ongoing compression.