Hello,
Thank you for your query at DoctorSpring.com
So you have an on and off history of smoking ( around 10 per day for the last 13-14 years ). The good thing is you have decided to stop smoking, and hence you have taken the first adeqaute step towards prevention of lung cancer.
You seem to have acute pharyngitis, which could be due to smoking, as smokers do tend to develop chronic pharyngitis. A lot of constant coughing can also lead to minor bleeding from the irritated pharyngeal mucosa.
With this history, you should not worry about lung cancer. Lung cancer develops in patients smoking close to 2-3 packets per day over a period of 20 years or so. So your exposure is not adequate to cause lung cancer as of now, and if you quit it then the effects will be reversed.
However it is better you get yourself evaluated by an ENT specialist who can examine your throat and guide you accordingly. A course of antibiotics and a cough syrup like Ascoril will be sufficient for the infection.
Feel free to discuss further,
Regards.

Hello,
The blood could be coming from the irritated pharyngeal mucosa.
In chronic pharyngitis, the passage connecting your oral and the nasal cavity, is inflamed due to either infection, or smoking, and the inflammation takes over 6 weeks to recover.
In smokers over a period of time, this pharnyx could be very easily inflamed and lead to such minor bleeding.
Don't try to forcefully bring any mucus out, since it may lead on to further bleeding.
Since yoi have no cough now, just avoid smoking and also get an ENT specialist to check your throat.
Feel free to discuss further,
Regards.

Hello,
Yes please do not worry about lung cancer.
Just get yourself evaluated and get the treatment for pharyngitis after confirmation.
Regards.