The molar side

It feels like a flickering sensation, and I ate chocolate or similar sweets, and that area doesn't feel very good.

Is it because my gums are unhealthy, or is there decay inside? It's not severe yet, so I'm just carefully cleaning with interdental brushes, but why is this happening?

How often do you get scaling done?

I have to go pick it up, but why is it so hard to go to the dentist...