HIVES or URTICARIA
is a harmless rash of red blotches sometimes with small white
water bumps in the center.

Hives or urticaria are caused by allergy to
milk or other substances in the diet or home. They are itchy and eased
by calamine lotions.
No further treatment is usually necessary.
They go away within about three days. But if you notice that
your baby stops feeding well or begins struggling for breath you need
to attend your physician right away as they may be having a more severe
allergic reaction which will require intensive treatment.
Picture of Baby Urticaria / Hives: 