Fleas or bed bugs? Which is it?

Bed bugs leave large itchy sores whereas flea bites are usually just red itchy bumps. Here's a couple of ways to see if it's fleas. Put on a pair of long white socks and stand in the room where you think the bites are coming from. If they're in there, you should see them when they jump onto your sock. Another way is to put a shallow bowl of soapy water on the floor and a bright light just above it. At night the fleas will be attracted to the light, jump, and land in the water and drown. Hope this helps.