Stop ignoring subtle signs of cancer. A doctor explains when to get medical help.

Symptoms like stomach pain and bloating can be early signs of certain cancers that are on the rise in people under age 40. SDI Productions/Getty Images A doctor said some of the most common symptoms of cancer are easy to miss, especially early on. Unexplained pains, fatigue, and digestive upset could indicate an underlying health issue. If symptoms persist for longer than a week or two, follow up to seek additional care and testing. Exhaustion. Fever. Unexplained aches and pains. Bloating. ...