Hi.. Thanks for the query.. As you have a wisdom tooth coming which is leading to gross smell from that place then there is a possibility that there must be some gap between the gum and the wisdom tooth and it is causing food lodgement in that area.. Although there are no signs of any active gum infection in the form of gum swelling and pain but there can be bacterial overgrowth in that area that must be causing subclinical infection due to rotting of food debris leading to bad smell.. So it is advisable for you to keep the area clean and remove any food particles if they accumulate there. You should gargle with warm saline solution after major meals. Always gargle with atleast normal water after eating anything.. Do antiseptic mouthwash gargles twice a day.. Follow the above instructions for a week, and if the symptoms still does not get better then you should get a clinical examination done by a dentist.. Hope your query is resolved.. Regards.