Thank you for your query.
, nose bleed and weight loss
for 3 weeks needs to be re-evaluated and re-examined. I suggest that you get his blood pressure checked and have an ENT opinion.
The coating over the tongue can be explained in a mouth breather following nasal blockage.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.
Rajiv K Khandelwal