Bursitis.

Bursitis is an annoying ailment that develops when a bursa, a small fluid-filled sac that cushions bones, tendons, and muscles around your joints, becomes inflamed. These sacs help decrease friction and allow smooth movement in the course of physical exercise. A bursa is a small fluid-filled sac that cushions bone and soft tissue. If a bursa becomes irritated (by repetitive motion, prolonged pressure, injury, or infection), it becomes inflamed, swollen, and painful, which restricts movement.

Shoulders, elbows, hips, and knees are the most commonly affected areas. Symptoms typically manifest as localised pain, discomfort, swelling, and stiffness, which may worsen with movement or pressure. Signs can include redness and warmth of the joint, especially if infection is present.

Bursitis risk factors include repeated activities, improper posture, ageing, and certain underlying illnesses such as rheumatoid arthritis or gout. Jobs or sports that involve repetitive use of the joints increase the likelihood of developing bursitis.
Treatment generally aims to relieve pain and decrease inflammation. Sometimes, resting the affected joint, applying ice, and using anti-inflammatory drugs can be helpful. Physical treatment can assist in strengthening the surrounding muscles and avoiding recurrence. In serious cases you may need injections of corticosteroids or removal of excess fluid.

Preventive methods include proper posture, avoiding repeated strain, and adding regular stretching and strengthening exercises into everyday routines.