Tendons are connected to this region which may be injured, leading to inflammation or tendinitis (lateral epicondylitis, or "tennis elbow"). The interior percentage of the elbow can be a bony prominence called the medial epicondyle. Psoriatic arthritis: Psoriatic arthritis is actually a variety of autoimmune illness connected to joint arthritis https://www.theorthopaedicandpainpractice.com/service/elbow-pain/