What are the signs of lung cancer? Pay attention to these four aspects

Lung cancer is very common in life, and there are many causes of this disease. If it is not treated in time, it will threaten life. Generally, there are some precursors to lung cancer, including constant coughing, ineffectiveness of anti-inflammatory drugs, repeated pneumonia, blood in sputum, edema and other precursors.

With the increase of environmental pollution, the quality of air is getting worse, which leads to a significant increase in the number of people suffering from lung cancer. China has become the country with the most lung cancer. Many lung cancer patients are already in the late stage when they find out that they are sick. This is mainly due to the neglect of the symptoms of lung cancer. So what are the signs of lung cancer?
Coughing constantly, and anti-inflammatory drugs are ineffective <br/>When suffering from lung cancer, one of the most obvious symptoms in the early stage is coughing. Many people do not know enough about lung cancer. When they have a cough, they will choose to take some anti-inflammatory drugs, but for lung cancer, taking anti-inflammatory drugs has no effect. For patients with this situation, it may be that the patient has lung cancer. Moreover, for such patients, it is often found that the cough is a dry cough. When the cough sound changes, it may cause the patient to have blood in the sputum. These symptoms are typical symptoms of lung cancer patients.
Recurrent pneumonia <br/>After developing lung cancer, patients are also prone to lung infection leading to pneumonia. In this case, after a period of anti-inflammatory treatment, the symptoms will be relieved. In this case, many infected patients may feel that they have recovered. In fact, the lung tumor has not disappeared and will generally reappear after a period of treatment. If you find that the pneumonia you suffer from recurs, you should consider lung cancer.
Blood in sputum <br/>Many people do not pay attention to the occasional blood in sputum. Most patients only find blood after coughing up sputum. If they do not find it later, many people will not take it seriously. In fact, this symptom may be caused by the tumor invading the capillaries, causing the blood vessels to rupture and bleed. Because capillaries have a strong self-healing ability and recover quickly after minor injuries, continuous bleeding generally does not occur in the early stage, but blood in sputum is the most typical symptom of lung cancer.
Edema <br/>If cancer cells spread and block the bronchi, it will affect the normal respiratory function, causing the patient to experience chest tightness and shortness of breath. If the tumor continues to develop and invade the surrounding large blood vessels or veins without timely treatment, it may also cause upper limb edema and facial edema in severe cases.