My 3month old son has not pooped since last three days. what to do?

Poop: Are you breast feeding or is you child on formula?If he is on breast he can go as long as a week with outgoing. If he is on bottle and comfortable give extra water to drink. If uncomfortable, give hin prune juice to drink or add a tablespoon or two of dark karo syrup to each bottle.

Constipation: As a temporary, relief glycerin suppository otc could be used, if the problem persisted he need to be evaluated for milk change or other etiologies