Phototherapy is a treatment method that uses light to manage various skin diseases and other medical conditions. The principle of phototherapy is based on exposing the skin to light of a specific spectrum (ultraviolet or visible light), which helps reduce inflammation and improve skin condition. Phototherapy is most commonly used to treat dermatological conditions such as psoriasis, eczema, vitiligo, acne, and others.
Types of phototherapy
- UVB phototherapy (narrowband ultraviolet therapy). UVB (ultraviolet B) radiation has a wavelength of 290–320 nm and penetrates the superficial layers of the skin. UVB phototherapy is most frequently used for the treatment of psoriasis, eczema, and vitiligo. Narrowband UVB therapy (311–313 nm) is considered more effective and safer, as it reduces side effects and the risk of skin damage.
- UVA phototherapy (psoralen and ultraviolet A). UVA radiation has a longer wavelength (320–400 nm) and penetrates deeper into the skin. UVA therapy is usually combined with the use of psoralen, a substance that increases skin sensitivity to light. This technique is known as PUVA therapy and is used to treat severe forms of psoriasis, eczema, and other dermatological diseases.
- Photodynamic therapy (PDT). This type of phototherapy combines the use of photosensitizing agents with light exposure. PDT is used to treat certain types of skin cancer and precancerous conditions, such as actinic keratosis.
- Blue and red light therapy. Blue and red light are commonly used for the treatment of acne. Blue light helps destroy bacteria responsible for inflammation, while red light improves blood circulation and stimulates skin regeneration, thereby reducing inflammatory processes.
Indications for phototherapy
Phototherapy is used in the management of various skin diseases and conditions:
- Psoriasis. Phototherapy helps reduce inflammation and slow excessive skin cell proliferation, leading to a decrease in plaques and overall improvement of the skin condition.
- Eczema (atopic dermatitis). Ultraviolet radiation reduces itching and inflammation and alleviates eczema symptoms. Phototherapy may be used in combination with emollients and other treatment methods.
- Vitiligo. Phototherapy helps restore skin pigmentation by stimulating melanocytes (cells responsible for melanin production).
- Acne. Blue and red light therapy are used to destroy acne-causing bacteria, reduce inflammation, and prevent new breakouts.
- Actinic keratosis. Photodynamic therapy is used to treat precancerous skin conditions caused by long-term sun exposure.
- Seasonal affective disorder (SAD). Although phototherapy is primarily used for skin diseases, it is also applied in the treatment of seasonal affective disorder associated with a lack of sunlight during winter months.
How is phototherapy performed?
Phototherapy is usually performed in a dermatologist’s office or a specialized clinic and includes several stages:
- Before the session, the patient’s skin should be cleansed of cosmetics and impurities. The physician may recommend the use of specific creams or preparations if necessary to enhance the effectiveness of the procedure.
- The patient may sit or stand in a special cabin equipped with light sources. The duration of a session varies depending on the type of phototherapy and the patient’s condition, but it usually lasts from a few minutes up to half an hour. During the procedure, the eyes must be protected with special goggles, as ultraviolet radiation can damage vision.
- After the session, moisturizing or soothing agents may be applied to the skin to reduce irritation. It is important to avoid direct sunlight after UV therapy sessions, as the skin may be more sensitive.
The course of phototherapy depends on the disease and the severity of its manifestations. Typically, several sessions per week are required over a period of several weeks or months. The number of sessions and the duration of treatment are determined by the physician based on the patient’s condition and the skin’s response to therapy.
Advantages of phototherapy in Belarus
- Effectiveness in various skin diseases. Phototherapy has proven to be one of the most effective treatment methods for many dermatological conditions.
- Painlessness. Phototherapy is a non-invasive and painless procedure, making it accessible for patients with different skin problems.
- Minimal side effects. Although phototherapy may cause temporary side effects such as skin dryness or redness, it is generally well tolerated by most patients.
- Combination with other treatment methods. Phototherapy is often used in combination with medications to enhance treatment outcomes.
Contraindications for phototherapy
- Skin cancer or a predisposition to malignant skin tumors.
- Active skin infections.
- Photosensitivity (for example, in certain systemic diseases).
- Use of photosensitizing medications.
- Pregnancy and breastfeeding – require caution when prescribing phototherapy, especially PUVA therapy.
Phototherapy is an effective and non-invasive treatment method used for various skin conditions such as psoriasis, eczema, vitiligo, and acne. It is widely applied in dermatology and helps patients manage chronic skin problems, improve skin condition, and reduce inflammation.
