Dandruff and itchy scalp diseases explained simply - psoriasis, eczema and dermatitis
Read on to find out the causes of these scalp conditions and the best ways to treat them - because not all scalp treatments and anti-dandruff shampoos are created equal! Seborrhea Dermatitis & Eczema Dermatitis is a word meaning “inflamed skin” and is a common cause of scaly, red patches and an itchy scalp. It looks similar to dandruff, but the dandruff caused by eczema and seborrheic dermatitis is larger and the scalp is often inflamed. It can also affect the face, eyebrows, beard and central chest area. Symptoms Oily or dry scalp and dandruff Yellow-red scaling in one of these areas: The hairline Eyebrows...

Dandruff and itchy scalp diseases explained simply - psoriasis, eczema and dermatitis
Read on to find out the causes of these scalp conditions and the best ways to treat them - because not all scalp treatments and anti-dandruff shampoos are created equal!
Seborrhea Dermatitis & Eczema
Dermatitis is a word that means “inflamed skin” and is a common cause of flaky, red patches and an itchy scalp. It looks similar to dandruff, but the dandruff caused by eczema and seborrheic dermatitis is larger and the scalp is often inflamed. It can also affect the face, eyebrows, beard and central chest area.
Symptoms
Oily or dry scalp and dandruff
Yellow-red scaling in one of these areas:
The hairline
Eyebrows
Wrinkles between nose and lips
bridge of nose
Inside or behind the ears
Right in the middle of the chest
Causes
This type of skin irritation often occurs in areas with many large oil glands. The inflammation occurs in response to a “yeast fungus” on the scalp and to hair products that break down the oil secreted by the oil glands.
What factors make seborrheic dermatitis worse?
HIV and neurological diseases such as Parkinson's disease significantly increase the symptoms of dandruff, dry scalp and itchy scalp.
Physical or emotional stress are known triggers.
Genetic factors – close family members also suffer from this disease.
This condition tends to be more severe in winter.
psoriasis
This is another common itchy scalp condition that can also affect the knees and elbows.
Symptoms
Small, separate patches of red inflamed skin with very thick scaling.
If only the scalp is affected, this may be mistaken for a severe case of dandruff.
Causes
Genetic psoriasis often affects multiple members of the same family.
Emotional or physical stress are known triggers.
RECOMMENDED TREATMENTS
Itchy scalp conditions can be easily treated with a medicated anti-dandruff shampoo that contains the right balance of chemical ingredients such as:
tar
Selenium sulfide
Zinc pyrithione or zincomadine – can be toxic
Piroctoneolamine – less toxic than zinc pyrithione
Antifungals
Always consult your doctor for a diagnosis and proper treatment.
RECOMMENDED PRODUCTS
LA BIOSTHETIQUE is a specialized provider of natural skin, hair and scalp treatments. They've been at the forefront of specialist hair and scalp care for 50 years - so it's obvious that people really like their products!
As an experienced hair care professional and stylist, I have been using LA BIOSTHETIQUE in my salon for many years. I often have clients with dermatitis and psoriasis and know how distressing these conditions can be.
LA BIOSTHETIQUE produces a wide range of specialized hair care products - from antimicrobial dandruff shampoos to the ultra-gentle LA BIOSTHETIQUE Hydro-Lipid Balm for dry, sensitive scalps, which is a soothing, natural addition to any psoriasis treatment.
My clients trust me to give them the best hair care for their scalp concerns and I trust LA BIOSTHETIQUE to add a touch of natural luxury to any hair treatment regimen!
Inspired by Joe Giampa