This is a popular info graphic from Mount Sinai Hospital (link below) states that:
“Lateral Epicondylitis, or Tennis Elbow, is a common problem that is sustained through repetitive stress to the lateral elbow. The pain comes from inflammation of the tendon fibers from overuse through repeated arm motions, such as while hitting a backhand stroke in tennis.”
The problem is that, "Numerous investigators worldwide have shown that the pathology underlying these conditions [Tennis Elbow, etc.] is Tendinosis or collagen degeneration."
"An increasing body of evidence supports the notion that these overuse tendon conditions do not involve inflammation."
The Physician and Sportsmedicine ‘Overuse tendinosis, not tendinitis part 1’ – 2000 May;28(5):38-48 – Khan, Cook, Taunton, Bonar
It’s time to abandon the Tendonitis / Inflammation fallacy.