Olecranon Bursitis (Student's Elbow)

Overview

A bursa is a small, slippery sac of fluid that sits between skin and bone to reduce friction. The olecranon bursa lies over the bony point at the back of the elbow. When it is irritated it fills with fluid, producing a soft, often surprisingly large swelling that looks like a golf ball or small egg under the skin.

Most cases are not very painful — the main complaint is the lump itself, plus discomfort when leaning on the elbow or bending it fully. The classic cause is prolonged pressure: resting the elbow on a desk during long study sessions (hence "student's elbow"), on a car window, or on a hard floor while working. A single knock to the elbow can also trigger it.

Occasionally the bursa becomes infected, usually through a scratch or graze over the elbow. An infected bursa is red, hot, more painful and sometimes accompanied by fever, and it needs medical treatment promptly rather than physiotherapy. Gout and inflammatory arthritis can also cause bursitis.

Non-infected bursitis often settles over several weeks once the pressure is removed, though the swelling can be slow to resolve and may recur if the habit continues.

Causes and risk factors

• Prolonged leaning on the elbow: studying, desk work, driving, using a phone propped on the elbow
• A direct knock or fall onto the point of the elbow
• Repeated minor friction in manual work (plumbing, flooring, mechanics)
• A cut or graze over the elbow allowing infection in
• Gout, rheumatoid arthritis or other inflammatory conditions
• Previous episodes of bursitis in the same elbow

How we may be able to help

The first and most important step is to distinguish simple bursitis from an infected bursa, gout or a fracture. We examine the elbow for warmth, redness and range of movement and ask about any skin breaks or fever. If infection or gout is possible, or the swelling followed a significant injury, we can arrange a prompt online private GP consultation so that the bursa can be assessed, and if needed the fluid tested or an X-ray taken.

For non-infected bursitis, treatment is mostly about reducing irritation and helping the fluid resolve. Physiotherapy provides advice on padding and avoiding pressure, gentle elbow mobility exercises to prevent stiffness, and kinesiology taping to apply light compression. Therapeutic ultrasound and interferential therapy may be used to ease discomfort and support resolution of the swelling.

If the swelling is very large, persistent or keeps returning, we can arrange a specialist opinion through our online GP service, where other options may be discussed.

What you can do at home

• Stop leaning on the elbow — use a soft pad or an elbow sleeve at your desk if you cannot avoid it
• Apply an ice pack wrapped in a cloth for 10–15 minutes a few times a day for the first few days
• Keep the elbow moving gently through its full range to avoid stiffness
• Protect the skin over the elbow; keep any grazes clean and covered
• Avoid squeezing or trying to drain the lump yourself
• See a doctor promptly if the lump becomes red, hot or more painful, or you develop a fever