Hello i have gone through your query.first of all i wud strongly suggest you to stop illegal drugs and drug abuse as it is very unhealthy for your body. do you use to rub cocaine over gums? cocaine except taking it through nose users sometimes rub cocaine over their gums, causing ulceration of gums and the underlying bone. Cocaine mixed with saliva creates an extremely acidic solution which erodes tooth enamel and exposes the underlying dentine to decay and tooth sensitivity. Cocaine and crack cocaine cause dry mouth, which further increases the risk of tooth decay. Cocaine can cause tooth wear by tooth grinding (bruxism). treatment wud include: quiting the habit first full mouth Scaling (cleaning of teeth and gums) antiseptic mouthwash maintaining good oral hygiene. desensitizing tooth paste for sensitivity. i wud suggest you to visit a dentist for the proper procedure and guideline Hope this ans helps Regards Dr. Shesh