Thank you for your query.
This is temporary milk intolerance.
Please give your child some probiotic
syrup for seven days.If the problem still persists then change your formula to lactose free formula.Start weaning foods too.
Consult your doctor if the problem persists.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.