Its a clear indication of post extraction apthous stomatitis a yellowish mild slough and difficulty in taking food .Its a phenomenon due 1]stress or fear psychosis 2] traumatic extraction,3] often in smokers due macrophage deposition at site of injection,4]if
liver induction is low.U need to have a regular rinse of oral gargles, intake of
Vitamin B n C and use a emollient like LEOXONAX else can use warm ghee of homemade at the site. immediate symptomatic relief will happen and the antibiotic u need to continues along with cessation of smoke for 2 weeks.