Hello Dear User, Pan masala contains tobacco which have Nicotine and that might be the cause for your whitish lines inside your mouth. This may be diagnosed as Leukoplakia but there are other diseases like lichen planus, oral candidiasis depending on your past history which cannot be confirmed without the tests.( please do some medical diagnosis practically). Please stop using pan masala from now on as this may develop into complications such as even oral cancer. The medicine which you use may be helpful for the throat infection if you have fever, cough and flu like symptoms but not exactly for the white lines which you said. Have more Vitamin C content foods(like citrus fruits), Zinc content foods( like banana), Vit A foods( like carrot) which might be helpful. Don t try to forcefully open your mouth if you have pain. Please visit an Dental doctor. Have a good health, Thanks, Dr. Praveen ( Yashoda hospital, HYD).