What precautions should be taken when using phototherapy devices for vitiligo?

Treatment of vitiligo with phototherapy devices requires attention to aspects such as phototherapy dosage, skin protection, treatment frequency, and contraindications. During treatment, it is essential to strictly follow medical advice and monitor skin reactions closely.

1、Phototherapy Dosage

The initial dosage should be adjusted based on skin type and the severity of the condition to avoid overexposure and burns. Doctors will gradually increase the dosage according to the erythema response. A minimal erythema dose test is required before treatment.

2、Skin Protection

During treatment, normal skin should be covered, and sunscreen should be applied to non-affected areas. Special protective goggles must be worn when treating the eye area, and caution is needed when treating the genital area.

3、Treatment Frequency

Narrowband UVB therapy is typically administered 2–3 times per week, while 308nm excimer laser therapy can be given 1–2 times per week. It is important to maintain a regular treatment schedule, as increasing the frequency without medical guidance may worsen depigmentation.

4、Contraindications

Phototherapy is contraindicated for individuals with photosensitive skin conditions, pregnant women, and those at high risk of skin cancer. During treatment, photosensitizing foods or medications should be avoided. If blisters occur, treatment should be stopped immediately, and medical attention should be sought.

During phototherapy, it is recommended to use Vitamin E cream for moisturizing and to avoid sun exposure. Regular follow-ups are necessary to assess repigmentation progress. If no improvement is observed after six months of treatment, the treatment plan should be adjusted.

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