What causes black gum line?
Patient: I am very concerned about my teeth turning black at the gum line. It also looks like they are eroding in the same area. I have recently been diagnosed with sugar diabetes. I also suffer from major depressive disorder and have Fibromyalgia. Why is this happening to my teeth? Doctor: Hello, Welcome Thanks for consulting HCM,   I have gone through your query,  as you have painful gums and teeth are black at cervical region dont worry it can be due to cervical abrasion , or deposition of stains and calculus at cervical region .  For this you should consult dentist and go for Restoration of tooth or if it is stains and calculus then go for Scaling andmroot planning.  Hope this will help you.