Seborrheic dermatitis of the scalp – causes, symptoms, and effective treatment

Seborrheic dermatitis of the scalp (often abbreviated as SD) is a chronic, recurrent inflammatory condition with a complex etiology. It affects adults, adolescents, and, in some cases, even infants. The affected areas of the skin appear unsightly, causing significant physical and psychological discomfort for patients and undermining their self-confidence. Given its chronic nature, the condition requires ongoing cooperation between the patient and a dermatologist or trichologist.

Characteristics and clinical presentation of seborrheic dermatitis

Seborrheic dermatitis of the scalp manifests primarily as excessive, profuse scaling of the epidermis, accompanied by inflammation in areas with the highest concentration of sebaceous glands. This condition affects young men with particular frequency, although in clinical practice, it is also diagnosed in women of various ages.

The primary clinical manifestations consist of erythematous patches covered with greasy, yellow scales and yellow crusts on the scalp, accompanied by chronic itching and a sensation of skin tightness. The course of the condition is characterized by fluctuating severity; a marked worsening of the skin condition is typically observed during the autumn and winter months, which is directly linked to reduced exposure to natural sunlight and a decline in the body’s overall immune resistance.

Main causes and triggers of seborrheic dermatitis

The pathogenesis of seborrheic dermatitis of the scalp is multifactorial. It involves, most notably, increased activity of the sebaceous glands and a qualitative change in the composition of the secreted sebum, characterized by elevated levels of triglycerides and free fatty acids. This environment becomes ideal for the excessive proliferation of yeast-like fungi of the genus *Malassezia*; while these fungi naturally inhabit human skin, they can trigger a strong inflammatory response when the body’s immune defenses are compromised.

Factors that exacerbate the progression and recurrence of the disease include:

• immune disorders (including in patients with compromised immunity),
• chronischer oxidativer und psychischer Stress,
• improper dietary habits and metabolic disorders,
• the use of harsh chemical agents in styling products,
• co-occurring neurological or hormonal disorders.

What are the symptoms of seborrheic dermatitis in different areas of the body?

The lesions are rarely confined solely to the scalp. The condition often extends to seborrheic areas of the face, including the nasolabial folds, the eyebrow region, the area between the eyebrows, the eyelid margins, and the chin crease. In some patients, erythematous, scaling patches also appear on the chest—specifically in the sternal region—and along the line of the spine.

In severe cases, intense scratching can lead to the development of painful fissures and weeping lesions on the skin. The mildest clinical form of seborrheic dermatitis (SD) on the scalp is common dandruff, which, if left untreated, can progress into full-blown inflammation. It is worth noting that in patients prone to hair follicle miniaturization, pronounced seborrheic dermatitis and hair loss may occur concurrently, further exacerbating the thinning of the hair.

Seborrheic dermatitis in infants (cradle cap)

In the youngest patients, a specific form of seborrheic dermatitis is known as “cradle cap.” It manifests as yellow patches on the child’s scalp, along with greasy scales and yellow crusts (often appearing as soft scabs on the infant’s hair-bearing scalp). These lesions may also occur in skin folds and in the diaper area.

Cradle cap is typically self-limiting and resolves within the first few months of life; however, in cases of severe inflammation, a consultation with a pediatrician or dermatologist is necessary to select safe keratolytic agents that facilitate the gentle removal of scales.

Clinical and laboratory diagnostics

An accurate diagnosis of seborrheic dermatitis is primarily based on a detailed medical history and a physical examination, during which the physician assesses the characteristic appearance of erythematous lesions and scales. To rule out other dermatoses with similar symptoms—such as scalp psoriasis or atopic dermatitis—advanced diagnostic imaging plays a crucial role.

At PT CLINIC, the diagnostic process is supported by a non-invasive optical examination known as trichoscopy. This procedure allows for a precise assessment of follicular openings, the degree of vascularization, and the severity of scalp inflammation through digital magnification. In certain cases, the physician may also order basic blood tests (complete blood count, thyroid panel, ferritin levels) and refer the patient for a trichological consultation.

Modern treatment methods for seborrheic dermatitis of the scalp

The treatment of seborrheic dermatitis is a long-term process that requires an individualized approach, given the recurrent nature of the condition. Standard medical management includes:

• Topical treatment – ​​the application of specialized emulsions, medicated shampoos, and solutions containing antifungal agents (e.g., shampoos with ciclopirox olamine or ketoconazole), calcineurin inhibitors, or mild corticosteroids during periods of intensified inflammation.
• Keratolytic agents – preparations containing salicylic acid or urea that facilitate the safe exfoliation of accumulated scales.
• In-office treatments – professional scalp cleansing, including a trichological scalp peel that normalizes the microbiome and reduces excess sebum.

In severe cases that prove resistant to topical treatment, a physician may initiate targeted oral pharmacotherapy. In-office clinical procedures are effectively complemented by modern biostimulatory treatments, such as scalp carboxytherapy—which improves tissue microcirculation—or specialized phototherapy, involving LED light therapy with anti-inflammatory effects.

Preventing recurrence and daily care

Maintaining remission in seborrheic dermatitis requires the adoption of rigorous hygiene and skincare habits. Following the completion of active treatment, the prophylactic use of antifungal shampoos is recommended (e.g., once a week or every second wash). It is essential to strictly avoid conventional, alkaline-based soaps, which disrupt the skin’s hydrolipid barrier and exacerbate irritation.

Eliminating trigger factors is also of key importance: reducing stress levels, maintaining a balanced diet rich in antioxidants, and avoiding stimulants. Any professional treatments or daily skincare products (dermocosmetics) should be discussed in detail with a specialist to prevent secondary damage to the epidermal barrier.

At the Piotr Turkowski Clinic, our approach to treating seborrheic dermatitis combines precise trichoscopic diagnostics with safe pharmacotherapy and professional trichological treatments, enabling effective symptom control and ensuring long-term comfort for our patients.