Cigarettes, gutkha, and chewing tobacco do far more than stain teeth. They starve the gums of oxygen, mask the early bleeding that signals gum disease, and are the single biggest risk factor for oral cancer, a disease that strikes India harder than almost anywhere in the world.
The encouraging truth is that the mouth begins to recover soon after you stop. Blood flow to the gums improves within weeks, and the risk of oral cancer falls year after year. If you use tobacco in any form, ask your dentist for a screening and honest support to quit; it is one of the most powerful health decisions you can make.