2. Hoarseness or Cough
These symptoms are especially easy to ignore if it’s cold and flu season, but a cough caused by a cold or the flu should go away in a short time. A cough that persists or unexplained hoarseness could be a sign of something far more serious like lung cancer. Most people are familiar enough with their body’s reaction to sickness to realize that a cough is lasting longer than it should be.
