Thanks for asking the query,
Due to poor oral hygiene your teeth had become infected at a very young age , there is spread of infection to the surrounding gingiva
leading to gingivitis
, pockets and abscess
There is no need to get embarrased , visit to the Dentist
and get a checkup done .
Take an OPG x-ray of the tooth.
If the tooth can be saved , you can proceed with Root Canal
treatment , followed by the placement of cap .
If the tooth is badly carious , loose in the mouth you can go for extraction , this can be replaced with fixed or a removable prosthesis
Meanwhile maintain a good oral hygiene .
Hope this helps out.