Thanks for asking the query,
It could be due to gingival infection leading to redness ,inflammation and swelling of the underlying gingiva . It can be aggravated by conditions like Diabetes
, nutritional deficiencies , poor oral hygiene , hormonal
changes , bleeding disorders .
Get complete mouth scaling and polishing done .
Use saline water gargles 3-4 times a day.
Use 0.2% of chlorhexidine
mouthwash gargles twice daily .
Take complete course of antibiotic and analgesic
oral ointment topically over affected area .
Get BT ,CT & blood sugar level done .
Hope this helps out .