question: Hi, i have had a cough for months. No coughing at night, mainly in the morning caused by this terrible constant tickle in the throat. Could lung cancer cause a tickle sensation in the throat and a constant need to clear the throat? I recently had sinusitus with a really bad cough and headaches. I had a ct scan on my brain as the headaches went on for weeks but it was all clear. I dont feel like my nose is leaking at the back of my throat, as in post nasal drip thats why im paranoid about lung cancer. Would i have any other symptoms with lung cancer? I had a chest xray about a year ago for another condition but it was all clear.