What is one common symptom of pediculosis?

One common symptom of pediculosis is an itching sensation. This intense itching is primarily caused by an allergic reaction to the saliva of the lice when they bite the scalp or skin. This reaction can lead to significant discomfort for the affected individual, prompting them to scratch the area frequently. Over time, excessive scratching can lead to secondary infections or irritated skin.

While other symptoms, such as red bumps or rash formations, may occur as a result of scratching or irritation, they are not the primary or most characteristic symptom of pediculosis. Dry skin is not associated with pediculosis as it relates more to factors like environmental conditions rather than an infestation. Thus, the itching sensation is the defining characteristic that helps in identifying pediculosis as it directly results from the lice infestation.