How can i tell if i have throat cancer?

Obvious lesion: Any mass in the throat needs to be seen. A clear white or red patch that lasts more than 2 weeks or that you just discovered and doesn't hurt needs to be seen. Most worrisome are painless cauliflower-like masses or ulcers. Having a "lump in your throat" when you get emotional isn't cancer. Good luck, and get seen if you are concerned.