Here’s a little tip that can make your back-carry babywearing experience more enjoyable and comfortable:
When you’re adjusting your baby carrier, be sure that the waist belt is on your upper hips nice and snug, and the shoulder straps aren’t too tight. If you’re feeling a pulling or tingling at your shoulders, it might be because the shoulder straps are too tight. With the waist belt snug and the shoulder straps eased up a bit, you should find a great hip-centered weight-distribution.
You want the bulk of your baby’s weight to be resting on your hips, not your shoulders, and this will help ensure that.