I dip tobacco and recently noticed part of my gumline has receded.  Visually  my gum line under my front bottom tooth has eroded and when I rub my finger along my gumline I can feel a clear recession only in that area.  Also, when I push on it, a white substance (pus?) comes from the receded area as well as from under the tooth.  How serious is this?
Hello, thanks for concern in Chat Doctor. Gum line recession generally occurs in hard brushing, poor oral hygiene, calculus deposition, crowded teeth, and in tobacco and barrel not chewing. Here you did not mention your oral hygiene status, brushing method. Visit a dentist nearby you because only by seeing your oral cavity he can diagnose. If you pus in your gums you may have pain, but you did not mention pain, if it is really pus you have to stop chewing tobacco and start medication (dosage depends on your body weight) and concern dentist for diagnosis and treatment.