Use of electric toothbrush

I use an electric toothbrush and dental floss.

Lately, I have been experiencing pain between my gums and teethㅠㅠ

I wonder if the part I slightly tied has come loose.

Some people are particularly good at paying that part.

I was told I was okay during the last check-up, but maybe it's because I've been feeling unusually tired lately.

It feels painfulㅠㅠ

Is there a correlation with using an electric toothbrush?