It is defiantly some type of inflammation of some sort , reasons , first it is a bulbous parturition in a localised area, it also has a sheen that suggests inflammation or reddening of the skin , this oddity is defiantly caused by some sort of foreign body that has been recently put into that area and that the body is having a reaction to ( IE inflammation and swelling , the desired effect but not to the point of noticeable deformity )