How Does Seborrheic Dermatitis Damage the Scalp and the Skin Throughout the Body?

1. Hair Loss: Seborrheic dermatitis causes inflammation triggered by the excessive growth of the Malassezia fungus, leading to weakening of the dermal papilla and stem cells around the hair follicles, which can lead to hair loss. 123

2. Itching and Irritation: The skin’s inflammatory response increases the release of pruritogen (itch) mediators, leading to itching and extreme irritation of the skin.

3. Corneal Exfoliation: Rapid shedding of keratinocytes results in yellowish and oily flakes on the skin. This leads to the breakdown of the epidermal barrier and a decrease in protection against external factors.

4. Secondary Infections: Damage to the skin and open wounds predispose to the invasion of pathogens such as Staphylococcus aureus, which increases the risk of superinfection.

5. Oily Skin and Pore Clogging: Excessive sebaceous (oil gland) activity increases sebum production. This can lead to clogged pores and the development of acneiform lesions.