Feels like skin is crawling

Hey! This is my first time posting. I am almost 4 weeks pp and lately I've been randomly experiencing the sensation of bugs crawling on my skin (legs, arms, back, scalp). Whenever I check, there are never any bugs present. Just curious if anyone else is experiencing this. I was wondering if it could be some sort of nerve issue related to getting an epidural? It's not a big problem, just something new that I didn't experience with my first child. Thanks!