Bursitis Symptoms: How to Recognize the Pain

Bursitis symptoms are pain and swelling at the affected joint — that is how MedlinePlus sums it up. StatPearls fills in the exam findings: pain on palpation and on active movement, while passive movement of the joint may be painless, plus warmth and redness over the inflamed sac in acute cases.

What a bursa is

A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving parts — muscle, tendon or skin. StatPearls describes it as a synovium-lined structure found near bony prominences throughout the body. When it becomes irritated it produces too much fluid and swells.

What causes it — and one cause that is not on the list

The causes named by US sources are consistent:

Prolonged pressure — StatPearls calls this the most common one. Kneeling on a hard surface, leaning on the elbows.
Repetitive motion, such as throwing a ball, in the NIH’s example.
A one-time event like a blow or a fall.
Infection, usually through a break in the skin over a superficial bursa.
Inflammatory and crystal conditions, notably rheumatoid arthritis and gout.

Being sedentary is not among them. Neither the American Academy of Orthopaedic Surgeons, nor the NIH, nor StatPearls lists inactivity as a cause of bursitis; the pattern they describe is pressure and overuse.

Signs that stand out

Localized pain at the joint, worse with direct pressure and with active movement.
Swelling, which is most visible where the bursa sits just under the skin — the elbow and the kneecap.
Tenderness over the bursa itself rather than deep in the joint.
Warmth or redness, which in the acute setting raises the question of infection.

How symptoms vary by joint

Bursitis usually affects the shoulders, elbows, hips or knees. The sites StatPearls names are the subacromial bursa in the shoulder, the olecranon in the elbow, the prepatellar, infrapatellar and pes anserine in the knee, the trochanteric in the hip, and the retrocalcaneal at the heel.

Bursitis next to tendinitis

The two involve different structures — a fluid-filled cushion versus a tendon — but they sit close enough to overlap. In the shoulder the bursa lies directly between the rotator cuff tendons and the acromion, which is why the AAOS covers shoulder bursitis and rotator cuff tendinitis on the same page rather than as separate problems.

Treatment and when to see a doctor

MedlinePlus describes the usual path: rest, pain medicine and ice first; an injection around the swollen bursa if symptoms persist; surgery only for cases that do not respond over a long period. Seek evaluation if pain persists beyond a few days, limits the joint’s normal movement, or comes with intense redness, warmth or fever — that last combination suggests an infected bursa and needs faster attention.

This content is informational and does not replace a medical consultation, diagnosis, or treatment.

Frequently asked questions

What are the most common symptoms of bursitis?

Pain and swelling at the affected joint. MedlinePlus keeps it that short. StatPearls adds that acute bursitis typically hurts on palpation and on active movement of the joint, while passive movement may be painless — and that warmth and redness over the bursa can appear.

What is a bursa and why does it become inflamed?

A bursa is a small, fluid-filled sac that cushions between a bone and moving parts such as muscles, tendons, or skin. The causes StatPearls lists are prolonged pressure — the most common — plus repetitive motion, trauma, infection, and inflammatory or autoimmune conditions such as rheumatoid arthritis and gout.

Does bursitis always hurt?

No, and this surprises people. StatPearls notes that chronic bursitis often presents without pain despite marked swelling, because the bursa has had time to expand and accommodate the extra fluid. A visibly swollen, painless elbow or kneecap is a recognized presentation.

When is bursitis an emergency?

When the bursa is infected. Redness, warmth over the joint, fever, or pain that worsens quickly point to septic bursitis, which needs antibiotics and prompt evaluation. It is not rare in the superficial bursae — StatPearls reports that up to a third of elbow and kneecap presentations are septic.

Sources

Written by Lucas Silva · Reviewed by Lucas Silva · Updated on August 14, 2026