• Also called as light therapy
  • It is the therapeutic use of UV rays
  • It has been widely used to treat many chronic dermatological conditions.

How Does it Work?

  • UV light decreases the local immunity in skin and stimulate melanocytes, reduces pruritus by reducing mast cells & langerhans cells.


Before session these are the precautions to be followed:-

  • Genitals should be covered
  • Eye shades/ goggles for eyes
  • Treatment area is uncovered & non-treatment area needs to be protected


  • Frequency of treatment is 2-3 times/week, Depending upon the skin type.
  • 1st session is started with very short duration of UV exposure & gradually exposure time is increased.
  • Treatment is continued until your skin gets cleared and to prevent recurrence.
  • Maintenance is done to reduce the chances of recurrence.

After Session:-

  • Protect your eyes for next 24 hrs
  • Use sunscreen when stepping outdoors

Phototherapy Types:-

  • Broad band UVB
  • NBUYB (308-311nm)
  • PUVA
  • Light via excimer (308nm)


  • Vitiligo
  • Polymorphous light
  • eruption
  • psoriasis GVHD
  • Atopic dermatitis
  • Lichen planus
  • Alopecia areata
  • Cutaneous T Cell
  • lymphona
  • Parapsoriasis
  • Urticaria pigmentosa
  • Dyshidrotic eczema