Is Oily Dandruff Bad?
Yes, while some scalp oil is healthy, excessive oiliness can contribute to a more severe form of dandruff. Oily dandruff, also known as seborrheic dermatitis, is characterized by yellow, greasy flakes that stick to the scalp, unlike the dry, white flakes associated with dry dandruff. This excess oil creates a breeding ground for the fungus Malassezia globosa, leading to inflammation, itching, and the characteristic flaking.
Oily dandruff is primarily caused by an overproduction of oil (sebum) by the sebaceous glands in the scalp. This excess oil fuels the growth of Malassezia globosa, a fungus naturally present on most scalps. When this fungus overgrows due to excessive oil, it triggers an inflammatory response, resulting in:
- Yellow, greasy flakes: Unlike dry dandruff, these flakes are often yellowish and stick to the scalp.
- Itching and redness: Inflammation of the scalp causes significant itching and redness.
- Oily, greasy scalp: The scalp itself feels excessively oily and greasy.
As noted in various sources, an oily scalp provides a "fertile ground" for the fungus to thrive, leading to the symptoms described above. Aromase explains that this is due to the excess oil secretion from the sebaceous glands. Furthermore, a dermatologist, as cited by Byrdie https://www.byrdie.com/how-to-treat-oily-dandruff-5088005, describes oily dandruff as appearing yellow and adhering to the scalp.
Is it Treatable?
While oily dandruff can be bothersome, it's treatable. Various shampoos, often containing ingredients like pyrithione zinc or selenium sulfide, are designed to combat the fungus and reduce oil production. Following a proper hair care routine, including regular washing with an appropriate shampoo, can significantly improve symptoms. However, persistent or severe cases may require consultation with a dermatologist for further evaluation and treatment.
