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Doctors are warning parents to be careful of head lice when shopping for Halloween costumes.

A lot of people are trying on those masks, wigs and hats in the store and could leave the bugs behind.

Doctors suggest wearing a swim cap or wig when trying on a costume.

Once you bring it home leave it in a sealed plastic bag for 48 hours to kill any lice.

And if the costume is dryer-friendly — throw it in on high for 45 minutes before wearing.