What are the signs that lice have infested? - briefly
Typical indicators include persistent itching, a tickling sensation, and the sight of live insects moving on the scalp or hair. Additional evidence is the presence of tiny, oval nits firmly attached near the base of hair strands, especially behind the ears and at the nape.
What are the signs that lice have infested? - in detail
Lice infestations reveal themselves through several observable and physiological cues. The most reliable indicator is the presence of live insects crawling on the scalp or hair shafts. Adult lice are about the size of a sesame seed, grayish‑brown, and move quickly when disturbed.
Nits—tiny, oval eggs—appear glued to the hair close to the scalp. They are often mistaken for dandruff, but unlike flakes, nits are firmly attached and cannot be brushed away easily. Their color changes from white or yellow when newly laid to darker brown as they mature.
Intense itching is a common symptom, caused by an allergic reaction to lice saliva. The itch typically intensifies several days after the infestation begins, prompting frequent scratching. Persistent scratching can produce small sores, redness, or secondary bacterial infections.
Scalp irritation may manifest as a reddened, inflamed surface, especially around the hairline and behind the ears. In severe cases, the skin may develop crusted lesions or small blisters.
Behavioral changes can also signal an infestation. Children may become restless, have trouble concentrating, or experience sleep disturbances because the parasites are most active in low light.
To confirm the problem, a thorough visual inspection is necessary. Using a fine-toothed comb on wet, conditioned hair can help separate lice and nits from the strands. Examine the comb after each pass; any captured insects or attached eggs confirm the presence of an infestation.
Key signs summarized:
- Live lice moving on the scalp or hair
- Nits attached within a quarter inch of the scalp, resistant to brushing
- Persistent itching, typically worsening after a few days
- Redness, inflammation, or small sores from scratching
- Sleep disruption or increased irritability, especially in children
- Visible eggs or nymphs after combing with a lice detection comb
These indicators, taken together, provide a comprehensive picture of a lice problem and guide appropriate treatment measures.