Hello doctor, i have been producing a lot of phelgm because of which i cough periodically. i smoke around 10 cigarettes a day is it because of that?

Possibly: 1/2 pk/day is a lot. When nicotine wears off, cillia in lungs "sweep" smoke/tar/"stuff" up&out, =cough. If developing early bronchitis, cough could become a permanent feature of your life. Try 2 less cigarettes/day every 2-3 days and make them disappear. Instead, hold a pen and/or occasional lollipop until "what to do w/my hands?" feeling fades. Cough should stop by 2-3 months off cigs.