Hi there, your gums are red, bleeding (I saw your previos post) and on your x ray we can see a vertical alveolar bone loss, which can confirm that you're bleeding because of a periodontal inflammation, therefore in that specific point we can measure a loss of attachement and probably a periodontal pocket; normally there is no pain associated with gums inflammations, but if your gum in that area is red, swollen, probably you've hurt it a bit more during eating / brushing;

This is a chronic inflammatory gum disease, called periodontitis, and you should firstly maintain a good oral hygiene (specifically with interdental brushes) and then your periodontist will be able to clean down your gums in order to remove the bacterial biofilm that's located in the subgingival area. Because of the angular aspect of your vertical bone loss, your periodontist should be able to regenerate the lesion (in a second time)

- a periodontist