my 4 month old baby have digestive problems every feeding he could not burp what i do

A. for booking your little one well you should always hold your child in upright position on your shoulder it will be very helpful at times making the baby home here and there in your life and then burping the child by diverting the attention to other surrounding helps a lot also as you mentioned that your little one has digestion issue in that scenario I would suggest you to feed slowly to your little one in proper intervals it will be helpful small quantity leads to better digestion