Yes, gums can get a bit neglected,then they bleed and get neglected even more cos people think they're brushing them too much!! The more you brush, the less they bleed!!.Many people get a build up of tartar,even though they brush quite adequately, this is because the make up of their saliva is such that their teeth fur up like scale at the bottom of a kettle.Quite often these people do not have much active decay due to the alkaline content of the saliva."Acidic" people err on the side of cavities, but have little or no build up of tartar,this is a generalisation as many of us have a balance of acid and alkaline and have cavities and tartar. Your immune system also plays a huge part in oral health and chronic infections can suddenly erupt at times of stress e.g holidays, christmas etc. AUG ( acute ulcerative gingivitis) is the bane of many a stressed student and can have a catastrophic effect on bone levels, the patient dribbles, cannot talk much and has a general malaise ( not to be mistaken with excess alcohol intake lol
) A swab taken at this time will show 'orrible crawly bugs!! and must be treated with specific antibiotics. I could go on but i'm boring myself!!! lol