5 signs of lung cancer warning are knocking, unpredictable danger

Chest pain

This is the most typical sign of lung cancer. The pain usually occurs when the person is active, coughing or laughing.

Unusual weight loss, unknown cause

Losing weight is not caused by diet, exercise, can be a sign of a certain disease, including lung cancer. The cause may be due to the appearance of tumors in the lungs, which causes a sudden increase in metabolism causing this condition.


It is an alarming sign, you need to see a doctor immediately. Dr. McKee stressed that coughing up blood (fresh or brown blood, mucus) is considered a sign of lung cancer, but this does not mean that you definitely have it.

According to the Mayo Clinic, there are many causes for you to cough up blood like bronchiectasis, chronic bronchitis or emphysema.


"We often tell patients that if you feel wheezing and can't take a deep breath, immediately go to the doctor," Dr. McKee said. Your doctor will check for risk of latent diseases like COPD or even anemia.

One cause of wheezing is asthma. In the US, about 10% of people over 65 are suffering from asthma. The disease can be activated from a number of other diseases such as chronic sinusitis.

Fingers are bigger than usual

Some lung tumors produce hormone-like chemicals. One of them pushes more blood and fluid to the tissues in the fingers, so they look thicker or larger than normal. The skin on the side of the nail looks shiny or the nails can be more curved than usual when you look at them from the side. It is uncommon, but finger shape is strongly associated with lung cancer: about 80% of people with the disease have this sign.