The onset of milia is widespread and can occur at any age or gender, and is even seen in newborns. Typically, it occurs after abrasions, scratching or inflammatory eruptions on the face, or damage from exfoliation or epidermolysis bullosa, or after blisters of herpes zoster, and there is also a genetic component to the disease. The following will provide a detailed introduction to the specific manifestations of the disease as well as diagnostic methods. 1, in the clinical, corn-like papules usually manifested as milky white or yellow pinhead to rice grain size firm papules, top round, covered with very thin epidermis. The papule is mostly distributed around the original lesion, which can last for several years and fall off naturally without scar formation. Individuals may have calcium salt deposits that are hard as cartilage and dark yellow in color when the damage is enlarged. 2. The disease is sudden, occurring on the genitals in adults, while in infants it is usually limited to the eyelids and temporal area. It may usually appear on the face, neck, shoulders, back or chest. The pimples are large in size, so they are also known as pustular sac damage. If infected, it can be painful and can likewise scar the skin. 3, corn-like papules and rosacea in the clinical performance is similar, in this need to make a distinction and differentiation. In addition to the papules on the face, the tip of the nose and the cheeks of the patient will also have capillary dilatation erythema. In the advanced stage, nasal eruptions are formed, often accompanied by seborrhea. In addition, blackheads are often present on the face in addition to papules pustules, nodules and cysts.