Source — Seborrheic Dermatitis Hair Loss Causes Treatments. What Is Seborrheic Dermatitis and How Does It Cause Hair Loss? Seborrheic dermatitis shows up as inflamed, flaky patches on the scalp, stubborn dandruff that won't quit, only angrier. It is one of the most common scalp complaints in adults, and this isn't just dry skin. It's an inflammatory response, your body reacting to an overgrowth of yeast called Malassezia that lives on most scalps naturally - the mechanism set out in the StatPearls clinical review of seborrheic dermatitis. For some people, their body overreacts. The scalp gets red and greasy, and sheds yellow-white flakes, and scratching feels inevitable. That's where hair loss creeps in. How inflammation hits your hair Seborrheic dermatitis doesn't destroy hair follicles outright, that's not how it triggers hair loss - the AAD overview of seborrheic dermatitis describes it as an inflammatory skin condition, unlike plain dandruff.
But the bigger issue, and scratching. Will Hair Lost From Seborrheic Dermatitis Grow Back? Temporary vs.