If you continue taking iron supplements after giving birth, constipation is not uncommon. Speak with your doctor regarding whether its appropriate to switch to an alternative product or stop the iron supplements altogether.
If you are taking painkillers or other medication, you can find out more about possible side effects for your digestion and constipation here
. Even when breastfeeding, you can still get your digestion moving with a laxative
. Speak to your doctor or pharmacist for an appropriate laxative that can be taken during breastfeeding.