Melasma is an acquired skin disorder that manifests itself as pigmented spots, most often on the face. These spots are characterized by a symmetrical distribution and may have different intensity and color. The main areas of damage include the forehead, cheeks, chin, and upper lip. Melasma occurs in most cases in women of reproductive age and is associated with factors such as hormonal changes, exposure to sunlight, and the use of cosmetics. The pathogenesis of the disease includes hyperpigmentation caused by excess melanin, which is produced by melanocytes in response to various triggers. Melasma is not a disease that requires emergency medical care, but it has a significant impact on the quality of life of patients, causing psychological discomfort and decreased self-esteem.
History of the disease and interesting historical facts
The history of melasma dates back to ancient times, when this disease was first mentioned in medical treatises. In Ancient Egypt, melasma was described as "spots on the skin" that were treated with various plant extracts and oils. In the Middle Ages, doctors associated the appearance of pigment spots with a lack of certain vitamins in the diet, as well as with various infectious diseases. In the 19th century, the first scientific studies on melasma began to appear, in which doctors studied its connection with hormonal changes in women. One of the first systematic approaches to studying the disease was proposed at the beginning of the 20th century, when a connection was established between melasma and the use of oral contraceptives. In recent decades, the disease has attracted the attention of dermatologists, which has led to the development of various diagnostic and treatment methods.
Epidemiology
The prevalence of melasma varies by geographic location and ethnicity. In countries with high levels of solar insolation, such as Latin American countries, its incidence ranges from 40% to 70% among women aged 20 to 50 years. Patients with skin phototypes III and IV, which suggest greater exposure to ultraviolet radiation, are particularly susceptible. According to modern studies, melasma is also diagnosed in men, but its prevalence among them is significantly lower, ranging from 10% to 30% cases. It is believed that the symptoms of the disease may intensify in the summer months, as well as in conditions of high humidity, which, in turn, increases the risk of relapse after treatment.
Genetic predisposition to this disease
To date, no specific genes have been identified that are directly responsible for the development of melasma, but there are studies that reveal a possible genetic predisposition. According to some genetic studies, mutations in genes responsible for the development of melanocytes and the regulation of pigmentation may increase the risk of developing the disease. Inherited polymorphisms in genes such as SLC45A2 and TYR may be associated with increased sensitivity of the skin to solar radiation, which may also affect the development of hyperpigmentation. Thus, a deeper understanding of the genetic mechanisms involved in the pathogenesis of melasma may open new horizons for the development of targeted therapy.
Risk factors for the development of this disease
There are many risk factors that contribute to the development of melasma, including both physical and chemical exposures. The main risk factors include:
- Exposure to ultraviolet radiation: Increasing the time spent in the sun significantly increases the risk of developing the disease.
- Hormonal changes: Use of oral contraceptives, pregnancy, and menopause are often associated with worsening melasma symptoms.
- Cosmetics: Some ingredients in creams and serums can cause contact dermatitis and, as a result, deterioration of pigmentation.
- Genetic predisposition: Having a family history of melasma increases the likelihood of developing it.
- Ethnicity: High risk in patients with dark skin phototypes, who are more prone to hyperpigmentation.
Diagnosis of this disease
Diagnosis of melasma is based on clinical examination and exclusion of other causes of hyperpigmentation. The main symptoms are the appearance of symmetrical brown spots on the skin, which may increase in size under the influence of sunlight. Laboratory studies in this case may include hormone tests to exclude endocrine disorders. Radiological examinations are usually not used, but dermatoscopy can help in visual assessment of pigmentary changes at the level of the epidermis and dermis. It is important to differentiate melasma from other dermatological diseases, such as chloasma, lentigo and post-inflammatory hyperpigmentation.
Treatment
Treatment of melasma should be comprehensive and individually tailored. General treatment includes the use of high SPF sunscreens that minimize sun exposure. Pharmacological treatment is often based on the use of bleaching agents containing hydroquinone, sesame oil, and vitamin C. Surgical treatments such as laser therapy or chemical peeling can be used to achieve a deeper effect on hyperpigmented areas of the skin. Modern clinics also use mesotherapy and microneedling. However, it is important to understand that melasma relapses are quite common, and maintenance therapy should be continued even after clinical remission has been achieved.
List of medications used to treat this disease
Among the drugs used to treat melasma, the following can be distinguished:
- Hydroquinone: Used as a bleaching agent.
- Tretinoin: Vitamin A that improves skin cell renewal.
- Pau d'Arco: has a whitening effect.
- Cosmetics with vitamin C: helping to lighten pigmentation.
- Creams with azelaic acid: used to regulate pigmentation.
Disease monitoring
Melasma monitoring involves regularly assessing the skin condition and monitoring for possible relapses. Control stages include scheduling regular visits to a dermatologist to assess the effectiveness of treatment and make adjustments to therapy. The prognosis for patients with melasma is favorable in most cases, but it is important to consider the risk of relapse, which can range from 30% to 50%. Complications of melasma are rare, but some patients may experience chronic discomfort and stress related to the appearance of the skin.
Age-related features of the disease
Melasma is most often found in women aged 20-50 years, but its cases can also occur in young girls, especially during pregnancy. In older people, the disease can manifest itself in a different form - in the form of age spots, which requires a special approach to treatment. In the younger age group, melasma can occur against the background of hormonal changes, while in older people, the main risk factors may be associated with photoaging of the skin.
Questions and Answers
- What is melasma? Melasma is a skin condition that causes pigmented spots, most often on the face, that is associated with hormonal changes and exposure to sunlight.
- Who is most susceptible to melasma? Women aged 20-50 are most susceptible to melasma, but cases of the disease also occur in men, and relapses often occur in people with phototypes III and IV.
- How is melasma treated? Treatment for melasma includes the use of sunscreens, bleaching creams, and laser therapy, as well as maintenance therapy to prevent recurrence.
- Can melasma go away on its own? In some cases, melasma may improve once triggers such as hormonal changes are removed, but it is best to consult a dermatologist to evaluate the condition.
- Is there a genetic predisposition to melasma? Yes, certain genes may increase the risk of developing melasma, especially in patients with mutations that affect skin pigmentation.
