Frequent wake ups

Alright, bare with me. Looking for anyone in similar situations and what you did. My son is a year and wakes frequently. It’s not even about self soothing himself back to sleep, he’s just such a light sleeper I feel like he’s never comfortable. He wakes on average 3-5 times a night and I can rub or rock him back down but an hour later he’s back up. I’m not sure what to do. I’m beginning to worry something is not right, anyone have an anemic little one and horrible sleep due to it?