Skin cysts this disease we may not have understood in life, in order to let more people for skin cysts this disease more in-depth understanding, we today want to provide you with a detailed introduction to the symptoms of skin cysts, only to understand the symptoms of the disease, we can better stay away from skin cysts. (1) Epidermal cysts: a kind of dermis containing keratin cysts. The epidermis is implanted under the skin due to trauma. The cyst wall is epithelial structure, but the basal cell layer is the outer layer of the cyst wall. The stratum corneum is the inner layer of the cyst wall and fills the cavity with keratin. The disease occurs on the scalp, neck and buttocks and back. Single or multiple, the diameter of a few millimeters to several centimeters, slowly increasing, soft and hard and cystic, the base can be moved, and often have adhesion to the skin. The skin surface does not have small openings like sebaceous cysts, and there is no pain, but only compressive pain if it occurs in a pressurized area. Can be secondary infection, according to records have the possibility of malignant transformation. (2) dermatoid cyst: often congenital lesions, due to the embryonic epithelial residue and occurred, is a misshapen tumor, is due to deviation from the original position of the skin cells composed of the original. In addition to the epidermal cells of the cyst wall, it also contains sweat glands, hair follicles and sebaceous glands. The lumen contains shed epithelial cells, sebum and other gruel, and there are hairs. Mostly confined cystic mass, found in young children and young adults, slow-growing, small size, soft round or hard cystic mass. It is located under the skin, without adhesion to the skin, but very tightly adhered to the basal tissues, not easy to push, and it is popular in the periorbital area, root of nose, occipital area and the bottom of the mouth, followed by the limbs, and the chest and back, and the long term growth of it can be cancerous. (3) Powdery mildew: formed by sebaceous stasis caused by occlusion or narrowing of sebaceous gland cystic duct. The wall of the cavity is composed of epithelial cells without keratinization, and the outside of the capsule is fibrous connective tissue. It is filled with sebaceous material gradually decomposed into semi-fluid material, containing a large number of cholesterol crystals. Through the above detailed introduction we should know what are the symptoms of skin cysts, we understand the disease often start from the cause of the disease and the symptoms, only in-depth understanding of these two aspects of our life in order to live a more healthy life, here to remind you must choose the regular hospital for the treatment of disease.