Patients with frozen shoulder can be diagnosed based on symptoms, physical examination, X-ray, magnetic resonance imaging (MRI), and other tests. An MRI of the shoulder joint, in particular, can determine whether there is inflammation around the shoulder joint and can be an effective method for identifying the location of the lesion and for differential diagnosis. Patients with frozen shoulder should first focus on rest and maintaining good posture. They can also use non-steroidal anti-inflammatory drugs (NSAIDs) to alleviate pain. Additional treatments may include applying heat, undergoing physical therapy, massage, trigger point injections, or performing functional rehabilitation exercises for the shoulder joint. Generally, these treatments can achieve good results. If conservative treatments are ineffective or if there is a functional impairment, surgical methods may also be considered for treatment.