 Millipedes do not bite, and their defensive secretions are mostly harmless to humans — usually causing only minor discolouration on the skin — but the secretions of some tropical species may cause pain, itching, local erythema, edema, blisters, eczema, and occasionally cracked skin.Eye exposures to these secretions causes general irritation and potentially more severe effects such as conjunctivitis and keratitis.This is called millipede burn.