Milia are small keratin-filled cysts that occur on the skin, most commonly on the face, hands, and eye area. They can range in size from 1 to 3 millimeters. The main cause of milia is a disruption in keratinization processes, which leads to the accumulation of keratin in the epidermis. Milia can appear as single elements or in groups, and although they are not painful and do not require treatment, they can cause aesthetic discomfort in patients. The disease occurs in people of all ages, but is most often recorded in newborns and adults, in particular in people with oily or combination skin.
History of the disease and interesting historical facts
The history of milia goes back to ancient times. The first mentions of this disease are found in medical treatises of the ancient period, which described various skin diseases that cause aesthetic damage. In the Roman Empire, doctors used various methods of removing milia, from physical to chemical. An interesting fact is that for centuries, milia was considered not only a cosmetic problem, but also a sign of abuse of sweet foods in medieval publications, which was associated with an improper diet. At the end of the 19th century, aesthetic medicine began to actively develop, and milia became one of the first problems that attracted the attention of dermatologists, which contributed to a more detailed study and understanding of this disease.
Epidemiology
According to modern research, milia has a prevalence from 1% to 40%, depending on the age and skin of the patient. They are most often diagnosed in newborns, where prevalence approaches 40-50%. In adults, the dynamics are less pronounced, but this phenomenon is also observed in the 1-2% population. As can be seen from the statistics, milia forms can vary significantly, affecting different population groups. Some studies indicate that milia is more common among women, which may be due to skin care practices and the use of cosmetics.
Genetic predisposition to this disease
Genetic predisposition to milia formation has not been definitively established, but studies suggest that small variations in genes associated with keratinization and skin metabolism may predispose to this pathology. Particular attention should be paid to the KRT17 and KRT2 genes, which are involved in keratin differentiation processes. Changes in these genes may contribute to disruption of normal skin cell function and keratinization, which in turn increases the likelihood of milia. The presence of familial cases may indicate a possible hereditary predisposition characteristic of certain forms of skin diseases.
Risk factors for the development of this disease
There are several important factors that contribute to the development of milia:
- Age: Newborns and infants are more likely to develop milia.
- Skin Type: Oily and combination skin, which is more prone to excess keratin production.
- Improper skin care: Using heavy or comedogenic cosmetics can lead to the formation of milia.
- Skin trauma: Injuries such as burns or cuts may predispose milia to develop in the area of damaged skin.
- Certain medical conditions such as dermatitis and systemic lupus erythematosus may be associated with an increased susceptibility to milia.
Diagnosis of this disease
Diagnosis of milia is based on clinical examination and characteristic signs. The main symptoms are:
- The appearance of small white or yellowish blisters on the skin, usually without inflammation.
- No pain when pressing on the milia.
- Localization in areas prone to keratin formation.
Laboratory tests are not routinely used to diagnose milia, but histological examination may be required in complex and ambiguous cases. Radiological examinations such as skin ultrasound are not used. The differential diagnosis includes dermatological conditions such as acne, keratosis, or sebaceous cysts, making attention to detail especially important during examination.
Treatment
Treatment of milia usually does not require medical intervention, as they resolve on their own. However, the following methods may be used to remove milia:
- Pharmacological treatment: topical retinoids, which reduce keratinization
- Surgical treatment: mechanical removal of milia using a sterile needle or laser therapy.
- Other treatments: Cryotherapy and chemical peels may help prevent new milia from forming.
It is important to remember that any treatment should be prescribed by a dermatologist after a thorough assessment of the skin condition.
List of medications used to treat this disease
- Tretinoin (retinoid)
- Adapalene (retinoid)
- Salicylic acid (for chemical peels)
- Cryotherapy (liquid nitrogen)
- Surgical removal under local anesthesia
Disease monitoring
Monitoring of patients with milia includes periodic examinations by a dermatologist. The prognosis is favorable in most cases, since milia are not malignant and do not pose a health risk. Possible complications may include infectious processes if removed carelessly. It is recommended to develop individual skin care recommendations to minimize the likelihood of recurrence.
Age-related features of the disease
In newborns, milia often occurs on its own and disappears by the first month of life without treatment. In adults, this pathology is persistent, which requires attention to cosmetic procedures and skin care. In older people, a combination of milia and other dermatoses is often observed, which can complicate diagnosis and require a comprehensive approach to treatment.
Questions and Answers
- What is milia? Milia are small keratin-filled cysts that most often appear on the face and are not painful.
- What are the main methods of milia removal? Milia removal can be done mechanically, with cryotherapy or laser therapy.
- Is drug therapy necessary for milia? Usually, drug therapy is not needed as milia resolve on their own, but topical retinoids can help prevent them from occurring.
- Are there any risk factors for developing milia? Yes, risk factors include skin type, age and improper skin care.
- What is the prognosis for milia? The prognosis is generally good; milia usually do not require treatment and may disappear on their own.
