The above suggestion re oregano oil sounds great! I´d also do oil pulling (I´ve sucessfully used organic sunflower oil) with a drop or two of oregano oil - will burn, but one gets used to it. Do this as often as you can, I´m sure this could help. Also Arnica Montana (homeopatic globulis) should help - would´nt know which dosis to recommend, but D6 is fairly harmless. Hubby sucessfully uses a tincture called "Arnica Heel", I think he takes 10 drops under the tongue???? Careful, may burn! Or with some warm water, gargle. I get drowsy and tired when I use, so usually take this in the eve. before bedtime and it does seem to work wonders.
Salud and best wishes!