Thank you for your query.
and the dark coloured urine are suggestive of dehydration
setting in. Kindly note the frequency of urination, make your son drink lot of fluids in the form of lemonade, buttermilk, coconut water and ORS
. If things do not improve it shall be better to consult your doctor and, if required, admit him for rehydration. Once rehydration begins you should be able to note a marked difference in him and his appetite will return.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.
Rajiv K Khandelwal