Seborrheic Dermatitis vs Dandruff: What’s Causing Your Flakes?

Flakes on your scalp making you feel self-conscious? Let’s talk about seborrheic dermatitis vs dandruff.

Whether your scalp feels like a snowglobe thanks to dandruff or you’re dealing with red, itchy seborrheic dermatitis, understanding what’s happening up there is the first step to taking control.

The two conditions have the same root cause, but require different approaches.

Below, we break down the key differences between dandruff and seborrheic dermatitis, common causes, and how to manage symptoms.

Dandruff is a scalp condition that causes skin to shed white or yellow flakes. The culprit? Malassezia yeast that thrives on the natural oils (called sebum) your scalp produces.

While dandruff isn’t harmful, it can trigger feelings of embarrassment. And aside from flake formation, it can cause unpleasant symptoms like itching.

Bad news: Men are more likely to develop dandruff than women. Experts think higher testosterone levels and oilier scalps might be to blame.

Dandruff typically peaks in your twenties, subsiding once you hit your fifties.

Good news: It’s not contagious and it’s more manageable than seborrheic dermatitis.

Seborrheic dermatitis (AKA seborrheic eczema or scalp eczema) is like a more severe form of dandruff. It’s also one of the most common scalp conditions. And, like dandruff, Malassezia yeast plays a role in seborrheic dermatitis.

This skin condition can cause a scaly rash on the scalp, but it can also show up on your:

• Ears

• Eyebrows

• Beard area

• Nostrils

• Chest

It often appears in babies as “cradle cap,” then flares again during adolescence, sometimes continuing into adulthood. Some people even experience additional flare-ups in their 40s.

Teens with seborrheic dermatitis are most likely to experience a rash on the face, upper chest, or groin folds.

Symptoms

Symptoms can vary depending on:

• Your age

• Your skin color

• Whether you have any other skin or medical conditions

Some of the most common symptoms include:

• Dry, flaky skin

• Redness and swelling

• Rash

• Scaliness

• Burning and itching

• Inflammation

Thankfully, seborrheic dermatitis doesn’t usually cause hair loss. But, severe inflammation can make existing hair loss worse.

Read more in our article Does Seborrheic Dermatitis Cause Hair Loss?

Your scalp is home to a bustling community of microorganisms, collectively known as the scalp microbiome (like the gut microbiome, but on your head).

This thriving, diverse ecosystem includes bacteria, fungi, and yeast that generally live happily together — until something throws off the balance.

Enter Malassezia yeast, which shows up on healthy and unhealthy scalps.

When your scalp’s microbiome is thrown off, Malassezia can grow out of control, feeding on natural oils and promoting rapid cell turnover. This triggers flaking and itching (AKA dandruff).

In people with seborrheic dermatitis, the immune system overreacts to yeast overgrowth. This causes redness, swelling, and yellow, greasy flakes.

Here are some of the main differences between seborrheic dermatitis and dandruff:

Let’s examine why these flaky-causing conditions might set up shop on your scalp (and beyond) and who may be at a higher risk for seborrheic dermatitis vs dry scalp from dandruff.

Seborrheic Dermatitis Risk Factors

Seborrheic dermatitis flares up when the perfect mix of risk factors comes together:

• Yeast overload. Higher-than-average levels of Malassezia yeast can trigger an inflammatory response in some people.

• Oily skin. If your sebaceous (oil) glands are in overdrive, Malassezia has something to feed on and multiply.

• Genetics. Studies suggest this condition might be genetic. If your parents or siblings have it, you might be more likely to develop it too.

• Stress. Poor mental health can sometimes show up as skin conditions like seborrheic dermatitis, especially if you already have other risk factors.

• Parkinson’s disease. There may be a link between this skin condition and Parkinson’s, a progressive neurological disorder.

• Weakened immunity. If your immune system is busy dealing with other conditions, seborrheic dermatitis may be more likely to crop up.

Dandruff Risk Factors

Here are some factors that might increase your risk of developing dandruff:

• Being male. While we can’t say for sure why this is, it may have something to do with testosterone levels and higher oil production.

• Age. Dandruff typically makes its debut during young adulthood, though it can stick around for life in some people.

• Having other medical conditions. Neurological disorders like Parkinson’s or Alzheimer’s and conditions that compromise your immune system, like HIV/AIDS or lymphoma, can increase your dandruff risk.

Both conditions often stem from an imbalanced scalp microbiome. Balancing out your scalp helps keep Malassezia yeast, oil production, and symptoms like inflammation in check.

Here’s how to do it:

Dandruff Treatment

You can usually tackle dandruff at home with over-the-counter (OTC) hair care products like anti-dandruff shampoo.

Check out our Dandruff Detox Shampoo, which contains 1% pyrithione zinc to help control itching and flaking.

Seborrheic Dermatitis Treatment

If your symptoms seem more in line with seborrheic dermatitis, your best bet is making a dermatology appointment. A dermatologist can create a personalized treatment plan based on the location and severity of your symptoms.

The first-line treatment for scalp eczema is a topical antifungal or medicated shampoo containing active ingredients like zinc pyrithione, selenium sulfide, tacrolimus, or ketoconazole.

 If these don’t work, a healthcare professional may recommend the following treatment options:

• Coal tar shampoo. This old-school remedy combines coal tar (or pine tar) with salicylic acid to help slow down the production of skin cells and reduce flaking. It’s effective for managing seborrheic dermatitis but has a distinct smell that isn’t for everyone.

• Immune modulators.Topical tacrolimus or pimecrolimus can help calm your immune system’s overreaction to yeast.

• Phototherapy. This UV light treatment may reduce inflammation and yeast overgrowth on the skin.

• Anti-inflammatory medications. Corticosteroid creams or oral anti-inflammatory drugs can help with severe inflammation. However, they’re not ideal for long-term use.

Home Remedies for Itching

You’ve started treatment. Great! But still experiencing pesky itching? Here’s how to relieve itching while you wait for treatment to kick in:

• Use lukewarm water instead of hot water when you shower or bathe. Hot water can dry out your skin and trigger itching.

• Apply a gentle moisturizer to affected skin after showering to help lock in moisture.

• Consider adding tea tree oil to your favorite moisturizer. Some research suggests it can be helpful for dandruff. The coconut oil in your cabinet might also act as a skin barrier protectant.

• Choose gentle, unscented personal care and household products versus ones with fragrances, especially if you have sensitive skin.

• Reconsider your shampoo routine. If you have sensitive scalp skin, it may help to shampoo less frequently.

Read more in our guide on 8 Home Remedies to Get Rid of Dandruff and our article on Tea Tree Oil for Dandruff.

Seborrheic dermatitis and dandruff are two common itchy scalp culprits, but they’re not the only ones.

Other potential causes include:

• Scalp psoriasis. This autoimmune condition causes skin cells to reproduce too quickly and form scaly patches or plaques that are thick and silvery. It often runs in families.

• Dry skin. Cold weather, dry air, dehydration, and certain hair care products can dry out skin and trigger itching.

• Contact dermatitis. An inflammatory allergic reaction that happens when skin comes in contact with something irritating, like the sun, certain fabrics, lotion, soap, or detergent.

Not sure what’s behind your scalp symptoms? It’s a good idea to check in with a healthcare professional to identify the root cause.

Seborrheic dermatitis and dandruff are common scalp conditions that can cause itchy, irritated skin.

Let’s recap what we know about these two skin issues:

• They can both affect the scalp. Dandruff is a milder, scalp-only issue, while seborrheic dermatitis is a chronic condition that can affect the scap and other areas.

• They both cause itching. However, seborrheic dermatitis also triggers inflammation. An overactive immune system may be to blame.

• They’re both treatable. You can usually address dandruff with OTC products. But seborrheic dermatitis requires a doctor’s help.

Not sure what scalp condition you’re dealing with? A healthcare professional can help you figure out what’s going on and recommend proven solutions.