Flea bites on humans look like small, itchy, red or darker bumps, sometimes with a lighter halo, usually in lines or clusters on the feet, ankles and lower legs. They usually last a few days. Most need no treatment beyond washing, a cold pack, an anti-itch cream or an antihistamine. Scratching can make them last longer and lead to infection, and people who are allergic to flea saliva can have bigger, longer-lasting reactions.
| Question | Short answer |
|---|---|
| How long they last | A few days; longer if scratched or if you are allergic |
| Look like | Small itchy bumps, sometimes with a halo; in lines or clusters |
| Where | Feet, ankles and calves; rarely above the knee unless sitting or lying down |
| Treatment | Wash, cold pack, hydrocortisone or anti-itch cream, antihistamine |
| See a doctor if | Signs of infection, allergic reaction, fever or illness, or bites lasting more than a few days |
Table of Contents
Flea Bites on Humans: Pictures
Flea bites are small, raised and very itchy. On lighter skin they look red; on darker skin they may look purple or dark brown. They often appear in groups of three or four, or in a line, where a flea fed several times as it moved. The pictures below show bites on a person and on a pet.
How Long Do Flea Bites Last?
Most flea bites settle within a few days. The itch is usually worst in the first day or two. Bites last longer when they are scratched open, become infected, or in people who are sensitive to flea saliva, who can develop larger welts or a rash. New bites keep appearing until the fleas in your home are gone, which can make it seem as if bites last for weeks.
What Do Flea Bites Look Like?
- Small, raised, itchy bumps, red on lighter skin and darker on darker skin
- Sometimes a lighter or discolored ring (halo) around the center
- In lines or small clusters
- Mostly on the feet, ankles and calves, because fleas jump up from floors and carpets
- Smaller than mosquito bites and they don’t swell as much
Not sure what bit you? Compare flea bites vs bed bug bites and fleas vs bed bugs. Bed bug bites tend to be on the upper body and appear after sleeping.
How to Treat Flea Bites
- Wash the bites with soap and water.
- Hold a cold pack on them to ease itching and swelling.
- Apply hydrocortisone or another anti-itch cream, or calamine lotion.
- Take an oral antihistamine if the itching is bad.
- Don’t scratch. Keep nails short and cover bites on children if needed.
When to See a Doctor
- Bites that look infected: spreading redness, warmth, swelling, pus or red streaks
- Signs of an allergic reaction: hives, swelling or shortness of breath, which need emergency care
- Fever, headache, body aches, nausea or weakness after flea bites
- Bites that don’t improve after a few days
Fleas can occasionally spread illnesses such as murine typhus and, rarely, plague, and pets can get tapeworms by swallowing infected fleas. These are uncommon, but fever or illness after bites deserves a doctor’s visit.
How to Stop Flea Bites
Bites stop only when the fleas do; see how to get rid of fleas in your house. Most fleas that bite people are cat fleas from pets, so treat every pet with a vet-recommended product and treat the home: wash pet bedding hot, vacuum carpets and furniture often, and empty the vacuum outside. See how long fleas live for why fleas keep hatching for weeks, and can fleas live on humans.
Flea bite relief and control
- 1% hydrocortisone cream
- Flea comb to check pets
- Washable pet bed
- Household flea spray with growth regulator
As an Amazon Associate, Pestbugs earns from qualifying purchases. Ask your vet which flea treatment suits your pet.
FAQ
Usually a few days. They can last longer if you scratch them open, if they become infected, or if you are allergic to flea saliva.
The itch is your body reacting to proteins in the flea’s saliva. People who are more sensitive have stronger, longer-lasting itching and swelling.
Bites themselves don’t spread, but new ones keep appearing while fleas are in the home. A rash that spreads may be an allergic reaction or infection, so see a doctor.
Rarely. Fleas can carry diseases such as murine typhus and, very rarely, plague. See a doctor for fever, headache, body aches or weakness after flea bites.
Flea bites are usually small, itchy and grouped on the ankles and lower legs, often in homes with pets. Combing your pet with a flea comb and finding fleas or black flea dirt confirms it.
Sources
This article is general information, not medical advice. Contact a doctor if you are worried about bites.
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