What primarily causes excessive oiliness in the scalp?

Excessive oiliness in the scalp is primarily caused by overactive sebaceous glands. These glands are responsible for producing sebum, an oily substance that helps to moisturize and protect the hair and scalp. When these glands become overactive, they can produce an excess amount of sebum, resulting in an oily scalp. This condition can be influenced by various factors, including hormonal changes, genetics, and overall scalp health.

While factors such as excessive shampooing and an improper diet can have an effect on the overall health and appearance of hair, they do not directly cause the sebaceous glands to become overactive. Low humidity can lead to dryness rather than oiliness, as moisture levels can affect how much oil the scalp produces. Understanding the role of sebaceous glands is key in addressing issues related to scalp oiliness and creating effective treatment or management strategies.