I am 25 years of age and a smoker since 4 years. Now I've noticed that there is two tone color in my gums ranging between pink to brown and grey, taken advice from the dentist who thinks that this has to do nothing with smoking and it is just a hormonal change. Kindly advise that is there any connection between smoking and the change of color of gums and is there any reverse process to minimize the damage done to the gums?