<s>[INST] i have been chewing Rajanigandha pan masaala for the last 16 years now i have minimized it to one packet per day from four to five. i am comcerned i have oral cancer because my chins are so tight when i open my mouth. it is not bulging enough when i blow up. i have been getting frequent sores on my tongue if i eat too spicy foods. i do not know to what speciality doctor to approach to get the diagnosis right. [/INST] Hi,Thanks for writing in.Small sores might progress to bigger sores and change the type of cells in them. This is earliest stage of cancer and if you stop eating completely then it will be good.Please consult an ENT surgeon and then have a clinical examination of your oral cavity done.The doctor will check for any sores or suspicious areas in your mouth. Please stop chewing completely. Avoid spicy food frequently. Please tell your inability to open the mouth completely to your doctor. The doctor might ask for follow up visit and you should get examined again. Please do not worry. </s>