Fatty granules include cornrows and sweat duct tumors. Fatty granules and sweat duct tumors differ mainly in the location and shape of their occurrence, as well as their etiology. 1. Corns: Corns occur on the face, especially on the eyelids and under the eyes, and the skin of corns is yellowish-white, firm and small papules. It is mainly due to tiny cysts formed by the retention of epithelial keratin in the epidermis or ducts of hair follicles, sweat glands and other skin appendages. The etiology is related to heredity, skin injury, adverse drug reactions and other factors. 2. Sweat duct tumor: Sweat duct tumor is commonly found in the periorbital region, especially in the eyelids, and can also occur in various parts of the skin. The patient’s skin is colored, yellowish or tawny hemispherical or flat papules. Sweat duct tumors originate primarily from sweat duct structures and are benign swellings. The etiology is not yet clear and may be related to genetic, mental abnormalities, endocrine and other factors. If you want to clarify whether it is a fatty granule or a sweat duct tumor, it is recommended that the patient go to the hospital in time for relevant examinations to clarify the cause of the disease.