Can someone help with this

Amaya

So ever since my son’s been born he always had fingernail beds that looked swollen but it’s everytime now when try to clip his nails he starts screaming bloody murder. We went to his pediatrician and in short, she said there’s nothing to worry about but I can’t help but worry because he won’t let me touch his nails and the just look red and swollen to me. I just need to know if I have to take him to the ER. Or if this actually is normal.