The difference between bed bug and flea bites shows in location, appearance and timing. Flea bites are usually on the legs and ankles, small, scattered and very itchy. Bed bug bites appear on skin exposed during sleep, such as the arms, neck and back, often in a line or a group of 3.
Quick comparison
| Flea bite | Bed bug bite | |
|---|---|---|
| Location | Legs and ankles, lower shins | Arms, neck, face and back |
| Pattern | Scattered or random clusters | In a line or 3 together |
| Appearance | Small red dot with a halo | Larger red welt |
| Timing | Any time, day or night | Usually during sleep |
| Itching | Strong and immediate | Appears after hours or a day |
See What Bed Bug Bites Look Like.
Signs that point to the cause
- Fleas: you have cats or dogs, or there are cats around the home. You see a small insect jumping. See Cat Fleas.
- Bed bugs: there are black dots and blood spots on the sheets, and bites increase after travel or after bringing in second-hand furniture.
- If bites happen only in bed, it is most likely bed bugs. If in the living room, on the floor and carpets, most likely fleas.
How to confirm
- Inspect the bed with a torch at night: mattress seams and the bed frame.
- Wear white socks and walk on the carpet; fleas jump on and are easy to see.
- Check pets and where they sleep, especially the neck and lower back.
- Place glue boards on the floor near pet areas.
The treatment is different
- Fleas: treat the pet at the vet, vacuum carpets daily, spray an insecticide on floors, carpets and pet sleeping areas, and repeat after 7 to 14 days. See Fleas at Home.
- Bed bugs: steam the mattress, apply a bed bug insecticide to cracks and the bed frame, and repeat after 10 to 14 days.
Products from Orkida
- Demand CS by Syngenta
- Optigard Flex by Syngenta
- K-Othrine Partix by Envu (formerly Bayer)
- POLTI Italian steam cleaner for mattresses
- Catchmaster glue boards
Bed bug and flea bite FAQs
Do fleas live in the bed?
Temporarily, if a pet sleeps on it, but they mostly live on the pet and in carpets, not in the mattress.
Can fleas bite without pets?
Yes, if there were pets in the home before, cats around the building, or eggs that hatched in the carpet.
Which bite is worse?
Both are usually minor, but heavy scratching can lead to infection.