Flea bites are small, itchy skin reactions caused by fleas feeding on blood. They often appear in clusters or short lines, particularly around the ankles and lower legs. Fleas commonly enter homes on cats or dogs, although other animals and wildlife can also carry them.
What flea bites may look and feel like
- small red, brown or purple bumps, depending on skin tone
- intense itching
- a tiny darker spot at the center
- several bites grouped around the feet, ankles or lower legs
It is not always possible to identify the insect from the skin reaction alone. Bedbugs, mosquitoes, mites and other insects can cause similar marks.
Self-care
- Wash the area with soap and water.
- Apply a cold compress wrapped in cloth for about 20 minutes if swollen.
- Avoid scratching and keep fingernails short to reduce skin damage.
- Ask a pharmacist about an oral antihistamine or mild corticosteroid cream when itching is troublesome.
Check suitability before using medicines in a young child, during pregnancy, or on broken skin. Most uncomplicated bites improve within several days.
Removing fleas from the environment
Treat all household pets with a veterinary flea-control product suitable for their species and weight. Never use a dog flea product on a cat unless a veterinarian confirms it is safe. Wash pet bedding, vacuum carpets, rugs, furniture and floor edges thoroughly, and empty the vacuum outside. A persistent infestation may require professional pest control.
When to seek medical help
Seek advice if pain, redness or swelling is spreading, there is pus, fever develops, or the bites are not improving. Mention recent travel or contact with rodents, stray animals or wildlife if fever, headache, rash or marked illness follows flea exposure, because fleas can transmit infections in some regions.
Call emergency services for difficulty breathing, swelling of the lips, tongue or throat, widespread hives, collapse or another sign of a severe allergic reaction.
Sources
Reviewed: 28 August 2026