Nummular eczema, otherwise known as discoid eczema, is a chronic inflammatory skin condition characterized by the appearance of round or oval eczema-like lesions. These lesions may have sharp borders, are raised above the healthy skin, and are often crusted. The condition can occur in both adults and children, causing itching, discomfort, and a significant reduction in quality of life. Both men and women are susceptible to this condition, but its manifestations may vary depending on age group, previous dermatological diseases, and overall health. Nummular eczema is considered a multifactorial disease, in which hereditary factors, immune responses, and the environment play an important role.
History of the disease and interesting historical facts
The history of nummular eczema research dates back to the early 20th century, when dermatologists first began to systematize and classify various forms of eczema diseases. In 1835, German dermatologist K. K. K. von Bartens noticed the similarity of lesions to coins, which gave the disease its name. However, even in ancient Greek texts there are references to skin diseases with similar symptoms. Interestingly, in the Middle Ages, it was believed that skin lesions could be associated with curses and spirits, which reflects society's attitude to dermatological problems as little understood and mystical phenomena.
Epidemiology
According to current data, nummular eczema affects about 2-3% of the population in different countries of the world. High incidence rates are observed in northern regions with cold climates, where skin diseases are more common. In adults, nummular eczema is most often registered at the age of 40 to 60 years, but cases of this disease are also observed among children. According to the latest epidemiological study conducted in Europe, the highest incidence rates are registered in men aged 50 to 70 years, which may be associated with high levels of stress and frequent contact with skin irritants.
Genetic predisposition to this disease
Genetic predisposition to nummular eczema is not fully understood, but certain genes and mutations have been identified that may play a role in the pathogenesis. Studies have shown that changes in the genes responsible for the synthesis of filaggrin may increase the risk of developing eczema lesions. In addition, polymorphisms in immune system genes such as IL-4 and IL-13 may also be associated with a predisposition to nummular eczema. Genetic studies show that having a family history of eczema increases the risk of its occurrence in immediate relatives, confirming the hereditary component of this disease.
Risk factors for the development of this disease
There are many risk factors that contribute to the development of nummular eczema. Physical factors include:
- Excessive exposure of the skin to cold or dry weather;
- Frequent contact with water, which can contribute to dry skin;
- Mechanical damage to the skin, including scratches and injuries;
- Allergic reactions to dust, animal hair and other allergens.
Chemical risk factors include:
- Contact with irritants such as detergents and cleaning agents;
- Incorrect use of cosmetic products;
- Chemical allergens such as nickel and other metals.
Other factors that may contribute to the development of nummular eczema may include stress, endocrine disorders, and underlying dermatological conditions such as atopic dermatitis.
Diagnosis of this disease
Diagnosis of nummular eczema is based on clinical examination and assessment of symptoms. The main symptoms include:
- The appearance of round or oval eczema rashes;
- Itching and burning in the affected area;
- Observation of exudative elements in the acute period;
- Dryness and thickening of the skin in chronic conditions.
Laboratory tests may include a complete blood count to determine the level of inflammatory markers and allergy tests to rule out an allergic nature of the rash. Radiological examinations are not required in most cases, but can be used to rule out concomitant pathologies. Differential diagnosis is important to exclude other skin diseases, such as psoriasis, fungal infections, and contact allergic eczema.
Treatment
Treatment of nummular eczema should be comprehensive and aimed at relieving symptoms and eliminating provoking factors. General recommendations include:
- Moisturizing the skin with special creams and lotions;
- Avoiding known triggers such as allergens and irritants;
- Maintaining clean skin and strictly following hygiene procedures.
Pharmacological treatment includes:
- Corticosteroid ointments to reduce inflammation;
- Immunosuppressants to control the autoimmune reaction;
- Antihistamines to relieve itching.
In rare cases, a surgical approach may be required to remove the affected areas of skin. Physical therapy methods such as ultraviolet therapy and magnetic therapy are also used.
List of medications used to treat this disease
Medications used to treat nummular eczema include:
- Creams and ointments based on corticosteroids (Hydrocortisone, Betamethasone);
- Creams with calcineurin inhibitors (Tacrolimus, Pimecrolimus);
- Antihistamines (Cetirizine, Loratadine);
- Immunomodulators (Cyclosporin).
Disease monitoring
Monitoring of nummular eczema includes regular dermatologist examinations and skin condition monitoring. The prognosis of the disease varies depending on the severity and the presence of concomitant diseases. With adequate treatment, most patients achieve remission, but relapses may occur. Complications include infectious skin lesions, which require additional therapy.
Age-related features of the disease
Nummular eczema can manifest itself differently in different age groups. In children, it can be most acute, with pronounced rashes and itching. In adults, chronic phases of the disease with long remissions often prevail. In the elderly, exacerbations are also possible against the background of age-related skin changes and decreased immunity.
Questions and Answers
- What is nummular eczema?
Nummular eczema is a chronic inflammatory skin disease characterized by circular, eczema-like lesions. - What are the main symptoms of nummular eczema?
The main symptoms include itching, burning, round bumps and crusts on the skin. - How is nummular eczema treated?
Treatment involves using corticosteroid ointments, keeping the skin moisturized, and avoiding triggers. - Is there a genetic predisposition to nummular eczema?
Yes, having a family history of eczema increases the risk of it developing in your offspring. - What is the prognosis for the disease?
The prognosis is generally positive; with adequate treatment, patients can achieve remission, although relapses are possible.
