Daily habits like consuming coffee, tea, and tobacco, along with poor oral hygiene, are primary causes of tooth staining in India. Dentists emphasize that while stains are common, unsafe whitening methods can be harmful. Experts differentiate between extrinsic stains on the outer surface and intrinsic stains caused by medications or aging, stressing that understanding the type of stain is key to effective, evidence-based treatment rather than risky trends.