Q&A (Frequently Asked Questions)

Q1: What skin conditions is this phototherapy device suitable for?

This device is suitable for the auxiliary treatment of:
Psoriasis (vulgaris), vitiligo, chronic eczema, neurodermatitis, atopic dermatitis, palmoplantar pustulosis, pityriasis rosea, alopecia areata, parapsoriasis, chronic skin ulcers, and mycosis fungoides.

⸻

Q2: What does “311” mean?

“311” refers to 311nm Narrowband UVB (NB-UVB).
This wavelength is considered one of the most appropriate and safer ranges for treating vitiligo and psoriasis, used widely in hospitals and home phototherapy devices.

⸻

Q3: How does phototherapy work?

Vitiligo:
• Stimulates the proliferation and migration of melanocytes
• Enhances tyrosinase activity
• Promotes melanin synthesis

Psoriasis:
• Inhibits excessive lymphocyte proliferation
• Reduces inflammatory cells
• Relieves local inflammation
• Helps regulate immune-related reactions

⸻

Q4: Do I need to cover normal skin during treatment?

Not necessary. Uncovered normal skin may tan or darken, but it is not harmful.
The skin tone usually returns to normal within 1–3 months through natural metabolism.

If you want to avoid tanning, you can:
• Cover normal skin with a light-blocking cloth
• Or apply sunscreen (SPF 30+)

⸻

Q5: Is phototherapy safe?

311nm UVB only penetrates the outer layer of the skin, making it one of the safer and commonly used dermatological treatment methods.
It is safe when used properly according to the instructions.