Unexplained Pain – Pain can be a result of numerous conditions, but ongoing pain which is unexplained and lasts a month or longer can signal bone, brain, or other cancers. Ask your doctor about any suspicious prolonged and unexplained pain.

Coughing – This is probably one of the most mundane and diverse symptoms on the list. There are a ton of different reasons that people cough, and more often than not they are trivial and temporary in nature. It’s when a cough persists over the course of weeks that someone should voice concern. If you find yourself in pain or shortness of breath during a cough it could be serious. If you cough up blood, it is serious. Smokers should pay particular attention to coughing, as it’s the most typical sign of lung cancer.