Hi, My son is 3 years and 8 months old. He is having congenital hypothyroidism and we have been doing blood tests every 3-4 months once as per his paediatric endocrinologist. Most of the times in hospitals, nurses have been using needle for taking the sample from wrist area, squezing the area around and it takes nearly 10mins and quite painful for him. Also we aren't allowed to be near him either to console him. Though once when we visited a diagnostic lab, we noticed they had used butterfly syringe to draw the blood from inside of the elbow region and it was easy and quick. But we are not sure if there are any downsides to it. Please suggest which is the better option and if anything wrong in latter approach?