What is a common sign of head lice infestation?

A common sign of head lice infestation is an itchy scalp. This itching occurs as a result of the lice feeding on the blood from the scalp, which causes irritation and an inflammatory response. The sensation of itching can often be one of the first noticeable symptoms, prompting individuals to inspect their hair and scalp more closely.

The presence of head lice can lead to additional symptoms such as the appearance of tiny white nits (lice eggs) attached to hair shafts, but the primary complaint is usually the itchiness associated with the irritation caused by the lice. Recognizing this symptom early can help in prompt treatment and control of the infestation, preventing further discomfort and potential spread to others.