How long does lice live on your hair if its untreated?

Head lice (Pediculus humanus capitis) can survive on a person's head for up to 30 days if left untreated. Female lice lay eggs (nits) that are firmly attached to individual hair shafts close to the scalp. These nits hatch into nymphs (baby lice) in about 7-10 days, and the nymphs mature into adults in about 10-12 days. Adult lice can live for up to 30 days and females can lay up to 10 eggs per day. Untreated lice infestations can lead to severe itching, discomfort, and potential infections due to excessive scratching. Prompt treatment and thorough lice management measures are necessary to eliminate the lice and prevent their spread to others.