I am a male aged 37 with skin type 1. I have had progressive poikilodermia of Civatte for the last two and a half years on sides of my neck. It got worsed over night during a summer holiday. I did use sun protection. I have both redness and brown patches. I have started with IPL treatment and I am currently on my 4 th session. Machine used is the Ellipse Nordlyse. Can not see much emprovement, but am told by my doctor to be patient. How many treatments is required for the pigmentation to fade?