Arm pain is not an early manifestation of lung cancer. Pre-lung cancer symptoms are not obvious, and with the development of the disease, patients will have cough and sputum, etc. Hand pain may be caused by physiological factors such as arm being pressed, repeating the same posture, or it may be caused by other reasons such as arm fracture. Lung cancer usually has no obvious symptoms in the early stage, and most of the patients discover it during chest imaging examination. However, with the aggravation of the disease, patients will show irritating cough, coughing up a lot of sputum, hemoptysis, shortness of breath, wheezing, chest pain, fever, hoarseness and so on. Patients presenting with arm pain may be caused by prolonged compression of the arm, repetition of the same movement of the arm over a long period of time, or weight bearing. In addition, fracture of arm, epicondylitis of humerus, tenosynovitis, muscle strain, osteoarthritis may also manifest as arm pain. Arm pain is usually not a pre-lung cancer manifestation, and it is recommended that patients with arm pain should consult doctor in time. If the arm pain is caused by physiological factors, no treatment is needed, but if it is caused by diseases, appropriate treatment measures should be adopted according to the doctor’s prescription.