How do you tell if you got flea bites or tick bites?

I've been getting these bumps that are itchy and has a little dark hole in the middle with puss coming out. I have about 8 red dots but they came at different times. Does anybody know and what should I do? I've got no pet and I wash my clothes and shower pretty often and I also checked my flea trap that I... show more I've been getting these bumps that are itchy and has a little dark hole in the middle with puss coming out. I have about 8 red dots but they came at different times. Does anybody know and what should I do? I've got no pet and I wash my clothes and shower pretty often and I also checked my flea trap that I set up for 7 hours and I see nothing. Please help!!!
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