Mite infestations in the eyelashes of the lid are a common problem seen in children. Demodex occurs due to the overgrowth of the mite in the follicles of eyelashes of the lid skin. Its cause is associated with a variety of factors which include poor hygiene, acne and lid margin disorders. The treatment However is surprisingly simple. Use of lid hygiene techniques combined with tea tree oil based shampoos are very effective in eradicating the disease.