How long do flea bites last in humans? - briefly
Flea bites usually heal within three to five days, though the surrounding redness and swelling may linger a little longer. Persistent itching or irritation can continue for up to two weeks before fully subsiding.
How long do flea bites last in humans? - in detail
Flea bites usually produce a small, red, itchy papule that appears within minutes of the bite. The initial irritation peaks during the first 24 hours, after which the redness and swelling begin to subside. In most healthy individuals, the visible mark disappears within 5–10 days. Occasionally, the spot may linger for up to two weeks, especially if scratching causes secondary inflammation.
Several variables influence the recovery period:
- Host immune response: People with heightened sensitivity can experience prolonged redness and swelling.
- Age and skin condition: Children and individuals with fragile skin may have slower healing.
- Location of the bite: Areas with thin skin (e.g., ankles, wrists) tend to resolve faster than thicker regions.
- Secondary infection: Bacterial invasion from scratching can extend the healing time to several weeks.
Typical symptom progression:
- 0–2 hours: Immediate itch and mild swelling.
- 12–24 hours: Peak redness, possible development of a small bump.
- 2–5 days: Gradual reduction in itch; redness fades.
- 5–10 days: Lesion resolves, leaving minimal discoloration.
- Beyond 10 days: Persistent mark suggests infection or allergic reaction; medical evaluation recommended.
When the reaction lasts longer than two weeks, shows increasing pain, pus, or fever, professional care is necessary. Treatment may include topical corticosteroids to reduce inflammation, oral antihistamines for severe itching, and antibiotics if bacterial infection is confirmed. Moisturizing creams can aid skin barrier recovery.
Preventive measures—regular pet flea control, vacuuming, and washing bedding in hot water—reduce exposure and consequently shorten the duration of bite-related symptoms.