Mange is an parasitic infestation of the skin of animals. Common symptoms include hair loss and itching and inflammation, all of which are caused by microscopic mites. Mange is most commonly found in dogs and other canines, but it can occur in other domestic and wild animals. Also called demodicosis or Red Mange, demodectic mange in dogs is caused by an overpopulation of Demodex canis. This is a mite that occurs naturally in the hair follicles of most dogs in low numbers around the face. In most dogs, these mites never cause problems. However, in certain situations, such as an impaired immune system, intense stress, or malnutrition, the mites can reproduce rapidly, causing symptoms that range from mild irritation and hair loss on a small patch of skin to severe and widespread inflammation, secondary infection, and - in rare cases - a life-threatening condition. Small patches of demodicosis often correct themselves over time, although treatment is usually recommended.