The judgment of frozen shoulder and lung cancer mainly refers to the identification between frozen shoulder and apical lung cancer, because both of them have shoulder pain. The judgment between the two is mainly through the characteristics of pain, clinical symptoms and imaging examination. 1. Characteristics of pain: â‘ Pain site, shoulder pain of frozen shoulder is in the anterolateral position of shoulder joint; shoulder pain of apocrine carcinoma is in the axilla and spreads upward and outward. Pain degree: Frozen shoulder pain is a dull pain, which will not keep on hurting; shoulder pain of lung cancer lasts for a long time and becomes more and more serious with time. 2. Clinical symptoms: Frozen shoulder gradually restricts shoulder joint activity, abduction and elevation, external rotation and internal rotation, and patients are limited in combing hair, lifting pants and tying waistbands; lung cancer is often accompanied by cough, sputum and hemoptysis. 3. Imaging examination: magnetic resonance imaging (MRI) of shoulder joint for frozen shoulder can show swelling in joint area, and CT examination of chest for lung cancer can show occupancy of lung tip. There are many causes of shoulder pain, so it is recommended to go to the hospital for further examination so as not to miss the diagnosis of apical lung cancer. If you suspect frozen shoulder or lung cancer, you should go to the hospital for further diagnosis and treatment.