How to detect fleas on a bed? - briefly
Inspect sheets, mattress seams, and pillowcases for tiny dark insects, tiny black specks (flea feces), and use a fine‑toothed flea comb to dislodge any moving specimens; set a white‑tipped sticky trap near the bed overnight to capture active fleas and verify infestation.
How to detect fleas on a bed? - in detail
The presence of fleas on a sleeping surface can be confirmed through visual inspection, physical evidence, and diagnostic tools.
First, examine the mattress, sheets, and pillowcases in bright light. Look for tiny, dark specks that move quickly when disturbed; adult fleas are 1–3 mm long and may appear as moving dots. Check seams, folds, and the underside of the mattress where the insects hide.
Second, search for flea debris. Collect any small, black, granular particles that resemble pepper; these are flea feces (digested blood) and indicate recent feeding. Use a white sheet of paper or a lint roller to sweep the area, then observe under magnification if possible.
Third, employ a fine-toothed comb or flea brush. Run the tool over the fabric slowly; fleas or their eggs will become trapped in the bristles. After each pass, tap the comb onto a white surface to reveal captured specimens.
Fourth, set up passive traps. Place a shallow dish of soapy water near the bed, covered with a piece of fabric that can be moved periodically. Fleas attracted to the warmth and carbon dioxide will jump into the liquid and drown. Check the trap daily for captured insects.
Fifth, consider a professional inspection using a UV flashlight. Flea feces fluoresce under ultraviolet light, making hidden deposits easier to locate.
If any of the above methods yield positive results, proceed to treatment: wash all bedding at ≥ 60 °C, vacuum the mattress and surrounding area thoroughly, and apply an appropriate insecticide labeled for indoor use. Repeat the process after 7–10 days to address emerging life stages.