Family member of a lung cancer patient asked: My father has had pain in the toe bones and joints in the bones of his feet, including the front toe bones, for a few years now. You said before that the joint pain could be lung cancer, because he smokes all the time and the amount is quite high. Should he go to the hospital and have his lungs checked directly, or should he have a blood test? I used to go to the local hospital and said there was no cure, saying it was line paralysis. Doctor: If you are a perennial smoker and you smoke quite a lot, whether or not you have other external symptoms, you should have regular checkups, especially after the age of 50, because they are really a high incidence group for lung cancer. In your father’s case, you can go to the hospital to have a chest X-ray or a direct “low-density spiral CT”, the latter is more likely to detect microscopic lung cancer, which is often very large when it can be seen on a chest X-ray. Indeed, the first symptom of many lung cancer patients is not coughing and coughing up blood, especially for women who do not smoke but have lung cancer, their lung cancer grows on the outside of the lung, and because it does not irritate the airways, they rarely cough until the end. Some orthopedic surgeons in some hospitals refer more than a dozen people from their orthopedic clinics to the oncology department in a year. These people thought their shoulder pain was frozen shoulder and went to the orthopedic department, but after examination, they found that their joint pain was already an “extra-pulmonary symptom” of lung cancer. There are many different “extra-pulmonary symptoms” of lung cancer, including joint pain in the limbs and abnormal itching of the skin, etc. These symptoms, which seem to be unrelated to lung cancer, are all early signs of lung cancer. However, the problems on your father’s feet seem to be unrelated to lung cancer. When you go to the hospital, you can have your uric acid and toes tested, especially the thumbs, which are red, swollen and painful without damage, which is often a sign of “gout”.