Let me answer your question ... You eat too much ... You need a long time to recover ... Find an expert ... write a prescription that can be rubbed in your mouth ... Use your toothbrush normally ... brush your teeth once every morning and evening ... Areca nut itself is good for your mouth and stomach. None of them is good ... The damage caused by his lime is slow ... especially if you smoke ... It will also increase the acidity of your mouth ... After the protective mucosa of your mouth is seriously damaged ... there is no protective layer ... Of course, there will be stones between your teeth ... This is normal ... It is the product of your not brushing your teeth after a lot ... and slowly accumulate fine lime ... Periodontal disease. ... gastric cancer ... may be an accomplice of betel nut ... it doesn't matter if you watch others eat it ... but you can follow it yourself ... but please quit as soon as possible after you have physical problems ... It's good or bad for you ... As long as you don't eat it for two years ... it will be fine if you rub it higher with a doctor's prescription ... It will also improve your taste buds in the future ... and your taste in eating will also improve.