My daughter has a small asd lately she has bee complaining about her legs hurting a lot. and that her chest hurts when she runs could it be her heart?

Possible: It's possible but not likely, assuming she has no other medical issues like blood clotting problems. The leg pain is unlikely related to the asd. Chest pain may be related if she's having abnormal heart bests , but those are also uncommon in younger children. Discuss these issues with her pediatric cardiologist, but i suspect they're likely unrelated to the asd.

Check the heart: Chest pain with an underlying cardiac defect warrants an evaluation . Leg pains are most probably growing pains but, again, it's a good idea to check out the heart.

No: Small ASD shouldn't cause chest or leg pain. A tread mill test called cardiopulmonary exercise test can help determine this for sure in your child's case. This test is not always necessary. Often your doctor can determine by taking more history and by doing a physical exam. I suggest an evaluation by either a pediatric cardiologist or a pulmonologist.