Seborrheic Dermatitis
Seborrheic Dermatitis — a common, chronic inflammatory condition that causes flaky, scaly patches and redness in areas rich in oil glands, such as the scalp, sides of the nose, eyebrows, and ears. On the scalp it often appears as dandruff, while on the face it can look like greasy, yellowish scaling. It tends to come and go in flares and is thought to involve the skin's response to a naturally occurring yeast.
Key points
- It affects sebum-rich zones and is linked to an inflammatory reaction to Malassezia yeast that normally lives on the skin.
- Symptoms often include flaking, redness, itching, and greasy scales, ranging from mild dandruff to more noticeable patches.
- Flares can be influenced by stress, cold or dry weather, hormones, and certain health conditions.
- Management commonly includes gentle cleansing and products with ingredients like zinc pyrithione, ketoconazole, or salicylic acid, guided by a professional when needed.
Frequently asked
Is seborrheic dermatitis caused by poor hygiene?
No; it stems from inflammation and the skin's reaction to natural yeast and oil, not from being unclean, and over-washing can sometimes worsen irritation.
Is dandruff the same as seborrheic dermatitis?
Dandruff is considered a mild form of seborrheic dermatitis on the scalp, while the broader condition can also involve redness and scaling on the face and other oily areas.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
