We noted this ourselves with our own child, which prompted us to consult her pediatrician. We were told that she's allergic to regular cow’s milk, and it would be very uncomfortable on her part to continue feeding her with this, especially because of the humidity in our area which aggravates the itchy rashes on her skin.
As per the doctor’s advice, we decided to shift her to an infant formula of hydrolyzed whey protein --- NAN H.W. One. The day after we started her on NAN, all her rashes disappeared. The positive effects of NAN definitely erased all our worries and assured us of our child's wellbeing.