Thank you for your query.
Every individual reacts in a different way to the similar illness/infection. It is not unusual for your son to complain of pain in the legs and diarrhoea
. Ensure that your son is adequately rehydrated. The infection should subside in the next 24-48 hours. Continue giving him Tylenol
in case he has fever
and/or complains of pain in the legs.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.
Rajiv K Khandelwal