### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, i have had a cough for months. No coughing at night, mainly in the morning caused by this terrible constanttickle 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.

### output:

Hello, Thanks for the query to Chat Doctor. Forum. Don't be in panic, as last year your lung X-ray was within normal limit, so need not worry. You are so scared about cancer that you are not thinking more than this. Cough with ticking in the throat may be due to, 1 Asthmatic allergic bronchitis as this develops sticky mucus (due to added infection after allergy) and when it expels from lungs then it sticks in throat, and you feel such type of tickling. This is not a post nasal discharge but mucus sticky in nature. This is the most common symptom in asthmatic allergic patient. Early in the morning cough (due to decrease in the temperature) is an indication of asthmatic allergic bronchitis. 2 Tuberculosis, can be confirmed by X-ray (fresh) and consult a physician and get his opinion. However, early tubercular lesion may be. 3 Cancer least possibility but fresh X-ray and MRI will find out the exact nature of disease. As all symptoms resembles like asthma, so consultation with a physician will help. Good luck. 