10 Warning Signs of Cancer Men Should Never Ignore

A long-lasting cough (more than 3 weeks) that doesn’t come with a cold, allergies, or other symptoms could be an early warning sign of lung cancer. Also, leukemia can also cause chronic coughing.

If you’re experiencing a strange, persistent cough, or if you cough up some blood, you absolutely need to see a doctor immediately. In some cases, lung cancer can also cause chest pain that reaches down the arm or up into the shoulder.