Cavity and bleeding gums are sing of vitamin deficency and poor hygien use good toothpast ,brush twice daily use clove oil apply on the gums are garggle with it , increase intake of citrus fruits which are rich in vit c

For the tooth cavity please get it checked by a dentist and get the filling done. If the bleeding is from the gums you can G32 Tablets, powder the tablet and massage it on the gums and retain for 5 minutes, rinse it with fresh water and repeat it 3 thrice daily.Improve on your oral hygiene and intake of Vitamin C , oranges, kiwi fruit, guava in the diet.