My baby is 3 months and from few days he is not feeding from one breast he cries if i feed him from that breast please help why suddenly he started doing this

A. it may be poor latching or colic . Infant colic as name suggest is common in babies up to 1 yr of age and more in top fed babies . So only mother milk should be given to baby followed by burping . Gastica drop can also be given 1 ml up to 3 times in a daygiven.