Hello Doctor, Before 2 days, i had experienced pain inside an top tooth especially while chewing and putting pressure. But after doing salt gargle, it became fine within 2 days. Now, there is no pain. But i can see slightly wound type mark on the gum where it was causing pain. I thought it's ulcer or something which happens inside mouth. So, i didn't put much attention to it. Now, i can see at that point gum has been slightly pulled back. I am not sure whether it's due to brushing at that side harshly or massaging (i had done this during pain). I have attached a pic of that area and also there are yellow line deposits under root of teeth. Could you please advise me which steps should i take ?