White spots on gums is often linked with tobacco use. It can also be a sign of infection, an allergic reaction, or a reaction to bleaching chemicals used to whiten the teeth. If the cause appears to be allergies, adjusting the diet, changing oral health products, or stopping a tooth whitening program may resolve the white spots.
Another cause is the development of bony growths in the jaw.
Patients who notice white spots on gums accompanied with extreme tenderness, bleeding, or puffiness may want to consult a dentist.