When you use hypnosis to quit smoking, it removes all cravings and withdrawal symptoms because your mind believes you are a non-smoker. It, therefore, stops reminding you to have a smoke at times when you used to smoke.
If the hypnotherapist replaces the habit with drinking water, then you will not gain weight because you won’t eat any more than usual, however, if you replace the habit with food then you will put on weight.
Being aware that the empty feeling associated with nicotine withdrawing from your body will help you from thinking you are hungry.
When you notice how well you are breathing, take advantage of that and take up some exercise! You will be getting fitter not fatter….