Hi there ...it could be due to improper oral hygiene ....visit your nearest dentist for proper teeth cleaning followed by oral hygiene maintainance ... As a home remedy...rinse your mouth with leukwarm salt water after every meals... Take care ..!!

Hi..it can be treated by gum treatment. Regards

Make an appointment with your dentist. Dentist will examine your teeth and gums and determine if you have a more serious condition, such as advanced gum disease. Your dentist might also take an x-ray of the teeth and gums. If the dentist believes treatment is needed, such as a deep cleaning or periodontal surgery, then do it accordingly. In some cases, bleeding gums are no big deal, but in certain instances can warrant professional treatment. With the right diagnosis and personal care, bleeding gums can become a thing of the past.

This is probably a sign of gingivitis. .. Please visit your nearest dentist get a scaling done. . even if there would be any other problem. . dentist will find out ..take care keep smiling :)