Final answer:
Seborrhea is the term for the excessive flow of oil from the sebaceous glands, which can lead to oily skin and scalp.
Step-by-step explanation:
The excessive flow of oil from the sebaceous glands is called seborrhea. Sebaceous glands are found in the skin and produce sebum, an oily substance that helps to lubricate and waterproof the skin and hair. When these glands produce too much sebum, it can lead to a condition known as seborrhea, which is characterized by oily skin and scalp, and can sometimes lead to further skin issues such as dermatitis.