How long do bedbug bites last? - briefly
Bedbug bite reactions generally resolve within 5–10 days, though itching can linger for up to two weeks. Persistent redness or swelling beyond this period may indicate an infection and should be evaluated by a medical professional.
How long do bedbug bites last? - in detail
Bed‑bug bite reactions typically persist for a limited period, but the exact timeline varies with individual sensitivity, bite location, and the number of bites received.
The initial phase appears within minutes to a few hours after the bite. Redness, swelling, and a raised welt are most noticeable at this stage. For most people, these early signs diminish within 24–48 hours.
If the skin response is mild, the lesion may resolve completely within 3–5 days. In cases of heightened allergic response, the swelling can be more pronounced and may last up to 10 days, occasionally accompanied by itching that extends the discomfort period.
A small subset of individuals experience a delayed hypersensitivity reaction. This secondary phase can emerge 5–7 days after the bite and may persist for two weeks or longer, often requiring topical corticosteroids or antihistamines to control inflammation and pruritus.
Typical progression:
- Day 0–1: Red, raised bump; possible itching.
- Day 2–4: Swelling reduces; color fades to pink or light brown.
- Day 5–7: If a delayed reaction occurs, itching intensifies; lesion may stay palpable.
- Day 8–14: Most symptoms subside; residual hyperpigmentation may linger for several weeks.
Factors influencing duration:
- Personal allergy profile: Stronger immune response prolongs symptoms.
- Number of bites: Multiple punctures increase overall inflammatory load.
- Anatomical site: Areas with thinner skin (e.g., face, neck) often heal faster than thicker regions (e.g., thighs).
- Treatment applied: Early use of anti‑itch creams or oral antihistamines can shorten the itching phase.
When symptoms extend beyond two weeks, worsen, or are accompanied by fever, secondary infection should be considered, and medical evaluation is advisable.