Hi, I had gone through your question and understand your concerns. Have you suffered any injury or blow to the elbow? Elbow lump can occur in any individual. Few reasons could be an injury, infection or an inflammation leads to olecranon bursitis (bursitis is an inflammation of small sacs of fluid (bursae). Symptoms could be pain, swelling or redness etc. Diagnosis of olecranon bursitis can be done from a medical history and physical exam. If swelling occurs due to an injury, X-rays may be necessary to determine whether the elbow is fractured.For infection in your elbow,doctor will drain fluid from the elbow with a needle and have the fluid tested by a lab. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us and voting. I will be happy to answer your questions