What are the main signs of lateral epicondylitis?

In daily life, lateral epicondylitis is a relatively common shoulder disease, and there are many causes of lateral epicondylitis. Generally, it is a disease easily caused by long-term playing or long-term labor. The main symptoms of lateral epicondylitis are joint pain, which can easily affect the health of the periosteum and cause some complications.

What are the main signs of lateral epicondylitis?

Lateral epicondylitis, also known as lateral elbow pain syndrome, is commonly known as tennis elbow. The main clinical manifestations are pain on the lateral side of the elbow joint, which may be aggravated by clenching the fist and pronating the forearm (such as wringing a towel, sweeping the floor, etc.), multiple tenderness in the local area, and no abnormal appearance. Lateral epicondylitis falls into the category of tendon injury and elbow pain in traditional Chinese medicine.

There is no local redness or swelling, and joint function is not restricted. There is localized tenderness over the lateral epicondyle of the humerus. Close inspection may reveal sensitive tender points.

Extensor tendon stretch test: straighten your elbow, make a fist, and flex your wrist. Then pronate the forearm. If it can induce severe pain on the outside of the elbow, it is positive. Due to myofasciitis, humeral epicondylitis will cause obvious pain when doing this test. X-ray examination: X-ray films generally show no abnormalities. In patients with a long course of disease, periosteal reaction may be seen, with calcification deposits near the lateral epicondyle of the humerus.

Mechanism of injury:

Instantaneous high-intensity force, especially when the muscle performs eccentric contraction, can easily lead to muscle strain, for example: the backhand action when playing tennis. Long-term, low-intensity, repetitive use can cause muscle fatigue, such as repetitive fist-clenching movements (such as moving objects, lifting things, holding a pen tightly to write, washing and wringing clothes) or finger extension movements (such as typing, using a mouse). When the muscles are overused, it can cause slight misalignment of the humeroradial joint.

disease:

Pain points: lateral epicondyle of humerus, belly of wrist extensor muscles (extensor carpi longus and extensor carpi brevis), and extensor digitorum muscles.

Extensor carpi radialis longus and brevis

Extensor digitorum

Pain mechanism: When making a fist, there will be pain and weakness on the outside of the elbow (upper forearm) (difficulty in making a fist).