My 1.7months old baby suddenly started hitting his own head and started pinching others and this behavior started after I gave birth to my second child n it's 16 days old baby How can I stop this behavior to change? Please guide

A. Your Child may think, another one baby joined in the family to take its share which will be the issue. Also your child may felt a distance from you after the second delivery. Naturally your child only below two years, may feel diffrently about your distance.