11 subtle signs you might have cancer

Both Bonta and Meyers listed fatigue - tiredness that doesn't get better with rest - as a cancer symptom that's easy to miss.

"When you have fatigue, my recommendation is do a little bit of analysis," Bonta said. There could be any easy explanation - maybe you've been sleeping poorly or recently started a new medication.

"But if all the other things are in order and this is a new symptom for you, then I'd be worried about it," Bonta said.