If complications to occur they tend to be minor and usually as a result of leaving the infestation untreated.
Skin - intense itching can lead to scratching, which can cause excoriation (skin flakes off) and/or infection.
Eyes - if the eyelashes have been affected there is a risk of:
Blepharitis - swelling of the eyelids. The patient will have a foreign body or burning sensation, there may be excessive tearing (liquid tears), itching, photophobia (sensitivity to light), red and swollen eyelids, the whites of the eyes becomes reddened, blurred vision, or crusting of the eyelashes first thing in the morning.
Conjunctivitis - there is a thin layer of cells (membrane) between the inner surface of the eyelids and the whites of the eyes, called the conjunctiva. Conjunctivitis is when the conjunctiva becomes inflamed. Another name for conjunctivitis is pink eye. Inflammation causes tiny blood vessels (capillaries) in the conjunctiva to become more prominent, giving the eye a red or pink look.
Corneal epithelial keratitis - the cornea becomes inflamed.