Scalp Disorders
Seborrheic dermatitis.
Seborrheic dermatitis is a common, long-term inflammatory skin condition that affects oily areas of the body, especially the scalp. Dandruff is its mildest form.
TricoTest® $140Fully credited toward any Personalized Trichology Treatment Program.
Educational information, not a diagnosis. Updated October 2026.
Understanding it
About seborrheic dermatitis
It is associated with the skin's oil (sebum) and an inflammatory reaction to Malassezia, a yeast that normally lives on the skin. Besides the scalp, it can affect the eyebrows, the sides of the nose, behind the ears and the chest.
Symptoms often come and go. It is not contagious and is not caused by poor hygiene. It can be managed well, but it often returns, so a consistent, suitable routine matters.
Common causes
- An inflammatory response to Malassezia yeast
- Oily skin and excess sebum
- Stress and fatigue
- Cold, dry weather
- Infrequent or unsuitable cleansing
- Some medical and neurological conditions
Signs and symptoms
What you may notice.
- Greasy, yellowish or white flakes
- Redness on the scalp and along the hairline
- Itching
- Flaking of the eyebrows or around the nose and ears
Managing it
Approaches that may help.
Medicated shampoos
Over-the-counter shampoos with ingredients such as ketoconazole, zinc pyrithione, selenium sulfide or salicylic acid are commonly used to control flaking.
Regular, suitable cleansing
Removing excess oil and buildup consistently helps keep symptoms under control.
Know your triggers
Stress and weather changes often precede flare-ups.
Medical treatment
If symptoms are severe or persistent, a dermatologist can prescribe stronger treatment.
When to see a physician
If flaking is severe, spreading or not improving, please see your physician or a dermatologist.
How CRLAB may help
Understand first. Then choose your care.
Recommended first step
Personalized Treatment Programs
Scalp care guided by what your analysis reveals.
Depending on your TricoTest® findings, the Oil Balance focus area is designed for excess oil, visible buildup or sebum-related imbalance.
Programs starting at $96/monthTailored to your TricoTest® analysis results.
Learn moreTricoTest® Hair & Scalp Analysis
A private, guided appointment with a certified hair and scalp specialist.
TricoTest® $140Fully credited toward any Personalized Trichology Treatment Program.
Learn moreYour path at CRLAB
Private consultation
A one-on-one conversation in our discreet studio about your history and goals — without pressure.
Professional analysis
TricoTest® microcamera imaging and a hands-on assessment of your scalp and hair.
Personal guidance
A clear plan that may combine in-clinic care, home care or CNC® — and continued support.
TricoTest® $140Fully credited toward any Personalized Trichology Treatment Program.
Frequently asked questions
Your questions, answered.
We do not diagnose medical conditions; when medical care is involved, we collaborate with your physician.
Is seborrheic dermatitis contagious?
No. It is not contagious and is not caused by poor hygiene.
Can it be cured?
It is usually a long-term condition that can be managed. Symptoms often improve with consistent care, though flare-ups can return.
Is it the same as dandruff?
Dandruff is considered the mildest form of seborrheic dermatitis. Seborrheic dermatitis can also involve redness and affect other areas of the face and body.
Which program focus may help?
Depending on your TricoTest® findings, the Oil Balance focus area is designed for excess oil, visible buildup or sebum-related imbalance.
Still have a question?
Call us, or book a private consultation and ask in person.
Your next step
Start by understanding your scalp.
A private consultation in Laguna Hills.
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- Tuesday – Saturday · 9 AM – 5 PM
By appointment only - Private & no obligation
- Consultations take place one-to-one, in a private room.