What describes the onset and symptoms of tendinitis?

The description of tendinitis as having a gradual onset with diffuse tenderness and degenerative changes accurately reflects the nature of this condition. Tendinitis typically develops slowly, often as a result of repetitive strain or overuse, which leads to microtrauma in the tendon. This gradual development allows for diffuse tenderness to become apparent as the tendon's structure begins to show changes, such as thickening or scarring, resulting from the ongoing inflammation.

In contrast to acute injuries, which typically produce immediate swelling and localized pain, tendinitis symptoms are often more chronic and involve a gradual increase in discomfort and dysfunction over time. The presence of degenerative changes indicates that the tissue has been undergoing stress without adequate time for recovery, contributing to the broader, less localized tenderness often reported by individuals suffering from this condition.