Glandulae sebaceae are oil glands found in the skin that secrete sebum, an oily substance that helps to lubricate and protect the skin. Synonyms for glandulae sebaceae include sebaceous glands and oil glands. These glands are located throughout the skin and are responsible for producing the oil that keeps the skin soft and supple. While they are important for maintaining healthy skin, overactive glands can lead to skin problems such as acne. Proper skin care, including regular cleansing and exfoliation, can help to keep these glands functioning properly and prevent skin issues.