I am doing exercises n maintaining a diet regime for that for weight loss. I need to drink lemon warm water in the morning empty stomach. Few days back I found there is a hole like decaying is going on inside my corner teeth both sides. I came to know from internet that it's due to lemon. Then I drink by using a straw to not to spread the condition more. But after 1 1/2 months after one day I was getting a small tiny piece of rock like in my mouth during eating process. I came to know that's the part of my decaying tooth. I am very sad. Don't know whom to consult. Dietician/ nutritionist/dentist. My fear is due to it may due to lemon water, calcium deficiency or whether it will spread to other tooth's or not. I think ceramic filling will help to give the decay tooth a proper shape n cover the hole. My tongue hurts a lot when it will touch at that broken sharpen teeth's body. Please help.