Shortness of Breath
According to the American Cancer Society, regular shortness of breath or a hissing sound when breathing could be signs of lung cancer. Because a tumor clogs your airway or gathers fluid around your lungs, putting pressure on your lungs, you may have difficulty breathing. Many people generally don't pay attention because being out of breath is commonplace. However, if you have problems breathing even during routine activities like ascending stairs, carrying a shopping bag, or other non-stressful activities, you should see your doctor immediately once.
When the lungs are squeezed, obstructed, or irritated, they produce a hissing sound. Many other illnesses, such as allergies and asthma, also cause wheezing. Wheezing or shortness of breath may not be a significant symptom. However, if you experience problems breathing after sprinting up the stairs when you haven't before, you should see your doctor right away because these symptoms are most likely the result of a lung tumor obstructing your breathing. This is not a sign to be ignored! If your wheezing persists, you should see your doctor straight once. In any case, knowing you're sick is preferable to pretending you're not.