Ouch! Help my baby pinches while nursing!

Thea

Hi ladies, any breastfeeding moms out there who have experienced pinching? My six-month-old son pinches the top of my breasts and the back of my arms while nursing. How do you guys get young babies to stop pinching? Side note- His nails are always trimmed, he just pinches hard. I am getting red marks on my skin and it’s turning a relaxing bonding experience into a painful one. Any ideas are appreciated!