Thanks for the query to H.C.M. Forum.
If I were your's son treating doctor I would come up with these measures.
1 As overeating or hyper acidity may be the cause of such vomiting
so take light diet and also plain as liquid , fluid , juice with banana . As vomiting already under control so need not worry and in my opinion no need to visit an E R . If vomiting reoccurs then consult E R.
2 Rest is very important for this little boy 1-2 days .
As due to vomiting certain essential minerals deplete so child may feel pain all over body.
Avoid fried food , junk food , spicy food , chocolates , drinks with caffeine in them .
In my opinion antacid
is necessary for 3-5 days .
Good luck. Dr. HET