Hello Mam Thank you for your query, I will try to give my best advice regarding your problem. I have thoroughly gone through the things you have mentioned. Herpetic gigivostomatitis (you may call it Viral gingivitis) is commonest cause of such problems in this age group. I also agree to your doctor s view. Most probably your daughter may be suffering from herpetic gingivostomatitis, which recovers without any treatment within 10 days. Along with the ointment, I am suggesting few things which will provide more symptomatic relief to your grandson. • Avoid hot food and beverages • Give him plenty of fluids to drink. • Rinse his mouth with chlorhexidine kids mouthwash(Thermokind-F kid) twice daily(preferebly in morning and in night before going to bed) for 10 days.Do not give him anything to eat or drink for 30 minutes after using mouthwash and gel. • If he is experiencing more pain, you can give him Ibuprofen kids tablet (Ibugesic kid) 1 tablet thrice a day after meals for 3 days. Hoping for his fast recovery. Most probably he will recover soon. Hope this will help you. If you are having any more query regarding this, feel free to ask anytime. Take Care Regards