Mites like mange (Sarcoptes, Demodex, etc.) are microscopic insects that burrow deep into the layers of the skin to feed and live. Chewing their way through your pet’s skin creates inflammation and leads to secondary infections (bacteria, yeast, etc.).
Skin-lesions from mange can manifest all over the body, but the armpits, groin, ear margins, and areas having minimal hair (elbows, etc.) are most commonly affected. Swelling, redness, hair loss, crusting, oozing, or other lesions can occur secondary to mange.