1: prohibit the consumption of too hot, spicy and stimulating food, as well as some dry and salty nuts 2: quit smoking and alcohol, do not chew betel nut for a long time 3: balanced nutrition, more fruits and vegetables, vitamin supplement 4: maintain oral hygiene 5: timely treatment of systemic diseases: anemia, diabetes, etc. 6: maintain a relaxed mood, optimism and cheerfulness. 7: do not stay up late. Live a regular life and avoid overexertion.