It's usually triggered by allergies, second
(my mom smoked inside the house), dryness, etc. Also, if I get sick (which is once every two years, if that), the cough always gets 10 times worse, and doesn't heal.
Now it's getting more and more frequent, even in the absence of apparent triggers. I almost drink Robotussin like it's water.
Last time I got sick, my throat hurt terribly, and there was a large amount of blood in my sputum (some of it was entirely blood).