Hello, Looks like you got some aphthous ulcer in your mouth, don't worry its a very normal condition. Consume lot of liquids, take some multi vitamins (vit a, b complex, c, minerals and antioxidants) once daily for a week and it should be fine. You can buy some ulcer get with lidocaine which will relieve the condition. Take care

Maintaining good oral hygiene and use of an antiseptic mouthwash or spray (e.g. chlorhexidine) can prevent secondary infection and therefore hasten healing. A topical analgesic (e.g. benzydamine mouthwash) may reduce pain.

Hello, It might be ulcer or laceration. You can use oral ulcer gel . It will take 1week to heal completely.