Shoulder joint effusion with pain is mostly caused by acute trauma to the shoulder joint, or due to frozen shoulder or rotator cuff injury of the shoulder joint. Generally, local physical therapy can be carried out first, which can be microwave physiotherapy or far infrared ray physiotherapy, which can promote the absorption of inflammation, fluid absorption and relieve pain. Oral medication can be taken to relieve pain, such as Celecoxib, Loxoprofen sodium tablets, and Chinese medication, such as Dawuoluodan or Guqiqi Bone Strengthening Granules, can also be taken orally for treatment. Local drug injections, such as injection of sodium vitrate into the joint cavity, can also relieve pain and reduce fluid accumulation. If there is no improvement after the above treatments, or if the frozen shoulder continues to worsen and the rotator cuff tear does not get better, consider arthroscopic minimally invasive surgical treatment.