(Concern) My gums keep swelling and bleeding.

Recently, my gums have been swelling frequently and bleeding when I brush my teeth.

When your gums bleed, they say to brush that area more vigorously to remove the blood.

It was just for a moment, but then my gums swelled up again... it's a vicious cycle.ㅜ

Is it because a support was placed behind the teeth after the correction?

Should I go for gum treatment... or will medication be effective?

Please give me some advice.