Abstract

Dr. Samyukta R.*, Dr. Jayakar Thomas

ABSTRACT

Maculae ceruleae are bluish or slate-colored macules caused by louse bites and are often associated with pediculosis infestation. We report a case of a 14-year-old girl presenting with itching over the scalp for 10 days, along with asymptomatic bluish discoloration behind the left ear. On cutaneous examination, multiple small, slate-blue macules were noted behind the left ear and occipital region, along with nits and lice on hair shafts. The patient was treated with 1% permethrin lotion applied topically once weekly for two weeks, followed by wet combing. Good personal hygiene, treatment of household contacts, and washing of linens and clothing in hot water were advised. The lesions resolved within three weeks. Maculae ceruleae, though benign, serve as a useful diagnostic marker for pediculosis capitis, especially when infestation is mild or overlooked.