Please provide ur complete problem in detail

Hi Sir.., Your information is not enough for a proper diagnoses Since it may be a mouth ulcer, lasts for 5 to 7days Ulcer is a discontinunity of oral epithelium There are so many reasons for ulcers are as below *stress and anxiety *iron deficiency anemia *vitamin B12 deficiency *Gastric disturbances *viral infections *irritation of sharp objects and genetic factors APPLY DOLOGEL for pain relief{it can cause numbness of affected sites, You can use before eating}

You must consult an Oral Medicine expert advice

Details insufficient to provide meaningful answer.