Thanks for your question.
Do you feel burning after taking spicy foods also?
Is there any white patch or spot on the tongue?
Does your son has such symptoms?
Any disease like diabetes etc you are diagnosed with or any medications you are taking?
Thanks for your input. There are several disorders which can cause burning tongue like fungal infections, burning mouth syndrome, diabetes etc but keeping in view the numbness in your tongue i would suggest that you should visit an ENT or Dental doctor to have it examined. Till you visit your doctor you can use OTC Dekatrin Gel on that lesion, if its a fungal infection, it will help you. I hope you can understand that without examination i can give you suggestions.
I hope this helps