Ala PDT pustular flare and collagen

One hour ala levulan incubation activated with 8 minutes omnilux blue for skin type 4. I was told blue better for skin type . What causes the tiny pustules on day 2-3 and that eventually drain out on own . Is it inflammatory reaction etc ? Second would activation with blue stimulate collagen or has to be activated with laser since blue only kills p Acnes . Thanks

Doctor Answers 1

Sterile pustules after PDT

A pustular reaction following PDT is well known to everyone who performs this procedure. It was first reported over 15 years ago, and thought to be sterile inflammation secondary to PDT. It settles over time, and is not infective. All the bestDr Davin Lim Laser DermatologistBrisbane, Australia. 

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