My brother , age 19 , is having very painfuly sores on uluva , lips and on the upper area of mouth. We have tried medicines like orasep LA , candid mouth pant, zenflox oz , derolac , bicosul z and even used home remedies like honey , milk and ghee etc but there is no sign of improvement instead its getting more painful he haven't had food or water from last 3 days and sores or increasing even after the medication. Please help ASAP