What is one common cause of seborrheic dermatitis?

Seborrheic dermatitis is a skin condition characterized by red, flaky patches and dandruff, primarily affecting areas rich in sebaceous (oil) glands, such as the scalp and face. One common cause of seborrheic dermatitis is the overproduction of oil. This excess oil creates an environment conducive to the overgrowth of Malassezia yeast, a fungus that naturally exists on the skin but can proliferate in oily conditions, leading to inflammation and the symptoms associated with seborrheic dermatitis.

In contrast, while dryness of the skin can lead to various other skin conditions, it is not typically associated with seborrheic dermatitis. Excessive sun exposure can cause damage and irritation but does not directly contribute to the oily environment that triggers seborrheic dermatitis. Allergic reactions to products might cause irritation or contact dermatitis, but they do not specifically lead to the condition characterized by the overproduction of oil and the related fungal activity. Understanding the role of oil production helps in managing and treating seborrheic dermatitis effectively.