Joint pain or arthritis is a condition that almost everyone will always encounter in their lifetime and is a frequent problem for rheumatologists, orthopedic surgeons, orthopedic surgeons, TCM surgeons, and general internists. There are as many as a hundred diseases of rheumatic and immune origin, most of which involve arthralgia or arthritis. The most common disease that causes arthritis is osteoarthritis, or what the people call “long bone spurs”, which is called “osteophytes” in medical terminology, and about half of the patients over 50 years old suffer from this disease, so you can imagine how many patients there are in China’s huge population. The number of people suffering from this disease has increased significantly, especially as China enters an aging society. The bone spur itself is not painful, but when the arthritis becomes acute and swollen, the pain and even difficulty in moving is obvious. When the joint cartilage wears away and the joint space becomes significantly narrower, the pain and mobility problems will persist, seriously affecting the patient’s quality of life. Therefore, these patients need to take anti-inflammatory and analgesic drugs for a period of time to eliminate the inflammatory response and relieve the pain, but the side effects of the drugs are difficult to avoid, especially for those patients who already have high blood pressure, coronary heart disease and stomach disease, and many problems exist with or without the drugs. Therefore, joint cavity injection drug has become another option, which is well targeted, quick to operate, and has immediate therapeutic effect, avoiding the trouble and side effects of long-term oral medication, and is favored by patients and doctors. For other diseases like rheumatoid arthritis, ankylosing spondylitis, systemic lupus erythematosus, etc., when some patients exhibit refractory or intractable monoarthritis, increasing the dose of hormones or painkillers not only increases the systemic adverse effects of drugs, but also does not necessarily achieve the desired effect, which does more harm than good, while local injection for monoarthritis can quickly achieve the therapeutic effect, so that patients do not have to take more drugs . However, a growing number of studies have found that the accuracy of joint injections in clinical practice is not high, with a less than 50% probability of accurately hitting the target site. In other words, for most patients with joint injections, the drug does not reach the treatment site, which is one of the reasons why many patients feel that the treatment is ineffective or even more painful in some cases. When there is a large amount of fluid in the joint cavity, the injection is usually smooth due to the tension, but when the fluid in the joint cavity is not obvious and it is not possible to determine the site of fluid with the naked eye, or when the target joint is small or deep, accurate injection is very difficult. When the target of treatment is tendinitis, bursitis, tendonitis, or adhesion point inflammation, accurate injection is even more difficult. Musculoskeletal joint ultrasound technology is a new technology that has been gradually popularized abroad for more than a decade, with the unique advantages of non-invasive, non-radiation, inexpensive, sensitive and reliable, easy and efficient, and has very superior application value for the diagnosis and treatment of arthritis. It has been found that joint puncture treatment under ultrasound-guided positioning significantly improves the accuracy of injection by nearly 100%, regardless of whether there is fluid in the joint cavity, and whether the target site is tendon sheath, bursa, tendon or attachment point inflammation, it can be easily reached and rapidly completed, and the trauma to the patient is reduced to the lowest point, and the efficacy and satisfaction are greatly improved.