I experience some strange skin lesions on my leg(s). They have a bluish-black center and a red infected looking outer border. They came up suddenly. No pain, no itching. They have lasted x 10-14 days. Someday they look faded by the end of the day, then they look red and angry again the next. 4 or 5 on my lower leg, Also lots of little red bumps on my legs, chigger bite like, yet no itching! Any idea?