The appearance of small grains of rice on the face is a symptom of miliaria. Miliary papules are retention cysts originating from epidermis or adnexal epithelium, which can be divided into primary and secondary types. The former can be formed from the immature sebaceous glands or the epithelium at the lower end of the funnel from the neonatal period, and the injury can naturally subside. The latter often occurs after trauma, skin disease or drug treatment. Primary hair is more common on the face, especially around the eyelids. Secondary damage occurs at the site of primary damage. Typical skin lesions are yellow-white solid papules with smooth surface, round top and no fusion, with a diameter of 65438 0-2 mm, covering extremely thin epidermis, which can extrude solid horny spherical particles, generally without conscious symptoms. Skin lesions develop slowly, can last for many years, and occasionally fall off and disappear naturally. Its treatment method is to puncture the epidermis after local disinfection to remove small yellow and white particles. Laser ablation or electric drying can also be used as a treatment option.