New eggs are attached to the hair shaft very close to the scalp. Eggs that still contain a louse embryo are brownish in color, while the empty egg shells are white to grey. As the hair grow approximately 1cm a month, eggs that are about 1cm from the scalp are more than likely to have already hatched or to contain a dead embryo. It is best to remove anything suspicious so not to further infect anyone.
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Pharmacy Practice + Business and Profession Santé 2024 Survey on OTC Counselling and Recommendations(re: pharmacists)
