How long does the itching from a bedbug bite last? - briefly
Itching usually lasts between three and seven days, with occasional cases extending up to two weeks.
How long does the itching from a bedbug bite last? - in detail
The itching that follows a bite from Cimex lectularius typically begins within a few minutes to several hours after the blood meal. The sensation may persist for 24 to 48 hours in most individuals, although the exact timeframe varies with several factors.
Key determinants of the itch’s length include:
- Individual sensitivity – people with heightened immune responses or allergic predisposition can experience prolonged pruritus, sometimes extending beyond three days.
- Number of bites – clusters of bites raise the local inflammatory load, lengthening the period of discomfort.
- Location on the body – areas with thinner skin (e.g., forearms, neck) often react more quickly but may also resolve faster than thicker regions such as the back.
- Secondary irritation – scratching introduces mechanical trauma and possible infection, which can extend the itch for an additional 2–5 days.
Typical progression:
- Onset (0–6 h): mild redness and tingling appear; itch may be faint.
- Peak (6–24 h): erythema intensifies, wheal forms, and itching reaches maximum intensity.
- Resolution (24–72 h): inflammation subsides, redness fades, and pruritus diminishes.
- Post‑inflammatory phase (3–7 days): residual itching may linger, especially if skin has been broken.
Intervention with topical corticosteroids, antihistamines, or soothing emollients can accelerate the decline of symptoms. Without treatment, most cases resolve within two days, while severe reactions or repeated exposure may extend the discomfort up to a week.