Hi.. Thanks for the query.. Your symptoms are pointing towards gum recession due to deep gum infection and the condition is known as Periodontitis.. You should consult an Oral Physician and get evaluated.. A deep scaling and currettage should be done followed by a script of antibiotics like Metronidazole and anti inflammatory painkillers like Ibuprofen. Do antiseptic gum paint massage over gums and do antiseptic mouthwash gargles. Doing warm saline solution can also help in relief.. Chew a Vitamin C pellet daily to improve gum health.. If there is too much of root exposure due to gum recession then Gum grafts an be advised.. Hope this helps.. Regards..