Many skin lumps or pocks appearing within days over the body

Round, firm bumps or lumps ranging from the size of a lentil to a walnut appear within days in the skin: on the head, neck, udder, hairless or short-haired areas, and sometimes across the entire body. Often preceded by fever and lethargy, they may then become crusted over or develop into pits. One or a few isolated lumps fall under "Lumps under the skin"; slowly enlarging warts fall under "Skin warts".