There are many causes of left shoulder pain, for such as frozen shoulder, rheumatoid arthritis and other diseases caused by ibuprofen extended-release capsules, diclofenac sodium and other drugs can be taken. 1. Frozen shoulder: painkillers such as ibuprofen extended-release capsules can be used to relieve the symptoms of soreness. Ibuprofen extended-release capsules belong to non-steroidal anti-inflammatory drugs, with antipyretic, analgesic, anti-inflammatory effect, but taking this drug may appear nausea, vomiting, rash and other adverse reactions, allergic to any component of the ibuprofen, pregnant women, severe liver and kidney failure is contraindicated in the crowd. 2. Rheumatoid arthritis: for rheumatoid arthritis caused by shoulder joint pain can be applied diclofenac sodium to alleviate the symptoms of pain, taking diclofenac sodium may cause dizziness, headache, renal function decline and other adverse reactions, allergic to any component of the drug, peptic ulcer of the crowd should be prohibited to take. In addition, drugs such as celecoxib and etoricoxib can also relieve shoulder soreness, identify the cause of shoulder soreness, and combine it with other treatments such as hot compresses to relieve its symptoms. When shoulder soreness occurs, you should go to a regular hospital to clarify the cause of the disease, and under the guidance of the doctor for treatment.