You more than likely have gingivitis. It is from infected and irritated gum tissue.Brush with food grade hydrogen peroxide and baking soda every other day, preferably before you go to bed. Put some peroxide in a small cup and dip your toothbrush in and put baking soda in the palm of your hand and dab the wet toothbrush in the soda.
Orthodontics is also suitable option for dental problem.