It's because of the infection of the gums supporting structure called as the pyorrhoea also , causing the trouble. So it requires professional cleaning service called as scaling , and some medication
Next Steps
visit dentist for further clinical examination & treatment
Health Tips
Gargle with lukewarm salt water after every meals to maintain oral hygiene & eat lots of
vitamin C rich fruits like aawla, oranges, strawberry, Indian gooseberry etc.to improve your oral health.