Seborrheic Dermatitis and Hair Loss
A flaky, itchy scalp can contribute to hair loss over time. Here’s how seborrheic dermatitis affects hair, and what actually treats it.
What is seborrheic dermatitis?
Seborrheic dermatitis is a common inflammatory skin condition that causes flaking, redness, and itchiness on the scalp — often referred to as dandruff in its milder form. It’s linked to an overgrowth of a yeast called Malassezia that naturally lives on the skin, combined with excess oil production.
On its own, seborrheic dermatitis doesn’t cause permanent hair loss the way androgenetic alopecia does. But chronic scratching, inflammation, and scalp irritation can contribute to increased shedding and make an existing hair loss condition worse. It’s a different mechanism entirely from the DHT-driven process covered in our men’s hair loss treatment guide.
What actually treats it
- Ketoconazole shampoo — an antifungal that targets the underlying yeast overgrowth, the most common first-line treatment
- Zinc pyrithione shampoo — another antifungal/antibacterial option, often found in OTC dandruff shampoos
- Selenium sulfide shampoo — reduces yeast and scalp oil production
- Topical corticosteroids — for more severe inflammation, typically prescribed short-term
If you’re also dealing with pattern hair loss on top of scalp irritation, treating the seborrheic dermatitis first can make it easier to tell how much of your shedding is condition-related versus hormonal. See our OTC hair loss treatment guide for where ketoconazole shampoo fits into a broader routine.
Dealing with both scalp irritation and thinning?
See treatment options that address both scalp health and hair loss together.
See Treatment OptionsCommon questions
Does seborrheic dermatitis cause permanent hair loss?
Not typically on its own. It can contribute to increased shedding through inflammation and scratching, but hair usually regrows once the underlying scalp condition is treated.
Is seborrheic dermatitis the same as dandruff?
Dandruff is generally considered a milder form of seborrheic dermatitis, with flaking but less redness and inflammation than more severe cases.
Can I use ketoconazole shampoo with minoxidil or finasteride?
Yes, ketoconazole shampoo addresses a different mechanism than DHT-blocking or blood-flow treatments, so it’s commonly used alongside them without issue.
How long does it take to see improvement?
Most people notice reduced flaking and irritation within a few weeks of consistent use of a medicated shampoo, though full resolution can take longer for more severe cases.