What is lung cancer? What are the symptoms of lung cancer?

Lung cancer is a common malignant tumor of the lungs, and this disease can cause many symptoms, such as coughing, coughing up blood, and even chest pain. In addition, the main cause is frequent smoking or being in an environment of carcinogens, so prevention must be strengthened.

Lung cancer is a disease with a relatively high mortality rate at present, and it also poses a serious threat to people's health. In fact, the mortality rate of lung cancer has been reported everywhere in recent years. However, the rapid emergence of this disease has aroused everyone's attention and made more people aware of the harmfulness of this disease. What is lung cancer?
1. What is lung cancer ? Lung cancer is a common malignant tumor originating from the lungs. In the early stage, the symptoms are not obvious. However, after seeing a doctor, 75% of people find that they are already in the middle or late stage. The most common symptoms are severe coughing, weight loss, and obvious chest pain. Some people may not have any lung symptoms at the beginning, so they will gradually ignore it.
2. What are the causes of lung cancer ?<br/>Lung cancer is mostly related to smoking. Tobacco contains about 3,000 chemical substances, and these chemical substances are highly carcinogenic. Long-term smoking will naturally lead to cancer. The occurrence of lung cancer may also be related to the occupational environment. About 10% of patients have a lot of carcinogens in their occupational environment. For example, frequent exposure to insomnia or exposure to some chemical substances will naturally increase the chance of lung cancer if they are exposed for a long time.
3. What are the symptoms of lung cancer ? After being diagnosed with lung cancer, there are actually many symptoms. The first symptom is coughing, which accounts for about 35%. The cough caused by lung cancer is actually related to many diseases, such as obstructive pneumonia or other intrathoracic complications. In addition, there may be symptoms of coughing up blood. This is mainly because the tumor cells themselves are relatively abundant, so when coughing violently, it will cause blood vessels to rupture, so there will be obvious bleeding symptoms. In addition, some patients will have symptoms of chest pain, and most of these pain symptoms cannot be controlled by drugs, and sharp pain will also occur.