What is the main cause of bursitis?

The main cause of bursitis is indeed repeated trauma and forceful rubbing of the bursa. Bursae are small, fluid-filled sacs located throughout the body, serving as cushions to reduce friction between tissues, such as bones, tendons, and muscles. When there is excessive mechanical stress or irritation, such as from repetitive motions or prolonged pressure on a bursa, it can lead to inflammation, resulting in bursitis.

The inflammatory response occurs because the bursa becomes irritated and swollen, causing pain and discomfort, particularly during movement. This condition is often seen in individuals who engage in repetitive activities, such as athletes or those whose jobs require frequent bending, kneeling, or lifting. Understanding the mechanical nature of bursitis helps clarify why minimization of repetitive stress is crucial in preventing this condition.

Other factors like genetic predisposition, dietary deficiencies, or infections can contribute to inflammation in different contexts but are not the primary causes of bursitis itself. These considerations can be seen as secondary or contributory but do not directly lead to the condition in most cases.