my baby is 20 days old and he is crying continuously day and night , he will sleep for 5 min and he will start crying . feeding is proper I will feed him every 2 hours for 15 to 20 min

A. Gas. If your baby is crying a lot after every feeding, it may simply be a buildup of air swallowed while eating. It's thought that bottle-fed babes in particular may be more prone to swallowing a lot of air during a feeding. This can trap gas in their stomachs and be uncomfortable.