Yes, I had already visited the doctor and he said that this happened because of smoking. But I wanted to know how much nicotine affects gastric reflux
Smoking has been linked to gastric reflux for 2 reasons:
Nicotine can loosen the sphincter, predisposing a person to experience reflux, the direct cause of which is something else.
Smoke in the mouth can reduce salivation which, in turn, can reduce the clearing of stomach acid.
Those contributing factors having been recognized, neither smoking nor nicotine is considered a dominant risk factor for reflux. That is, they may contribute to it but aren't likely to be a primary cause. You say you smoked just 6 cigarettes a day; it's highly unlikely smoking seriously impacted, let alone caused, your reflux, particularly since you say you smoked for 10 years but began experiencing reflux only lately (caveat: i'm not an MD). The propylene glycol in most e-liquids, rather than the nicotine, has a drying effect on the mouth (a dehydrating effect on the body, actually). That may exacerbate your condition, tho' it would be the 1st time anyone has heard of such. Drinking enough water is the simple solution.
Too many doctors are too quick to identify smoking as the primary cause of every ailment under the sun. And too many are ignorant enough about vaping that they treat it as if it's the same thing as smoking. i would suggest strongly that you seek a 2nd medical opinion & a more thorough diagnosis.
In the meantime, since you're experiencing reflux, avoid smoking entirely and either stop vaping or, if you need to vape to stay away from cigarettes, use e-liquid w/ a low % of pg & be sure to drink plenty of water. Doubtful it will help but it won't hurt.