Hello Doctor! My son is 2 year & 3 months old and he has a problem with tongue ulcer which looks like white patches on his tongue which occurs every after 2 weeks or 15-20 days. I have consulted pediatrician and have done all the tests like blood test etc which seems to be normal as said by the doctor,. so doc has prescribed me bifolate syrup & bifolate gel to apply. So kindly please suggest what should I do as it occurs very often . And when it happens he doesn't eat . waiting for the response. Thankyou!!