Hi Blues,
I’m afraid it was several years ago so I don’t know the exact details. I do know I was treated at high settings - I had some scabbing and a very strong reaction to the heat. It also hurt a lot! I have fair type III skin, and my hair was dense, dark and extremely noticeable - but each individual hair was fine. I started noticing the stimulation on my upper arms and shoulders after just the first treatment, but it didn’t happen on the lower arms until later. So if you do decide to have treatments, I would recommend having the first and then waiting a good 12 weeks before going in for another, so you can assess the difference. Take photos so your imagination doesn’t play tricks on you!
There are some other factors: I was young when I started treatment (around 20) and so my body may have reacted more strongly than if I had been older. I know for sure, though, that these were not hairs my body would have produced anyway. They look too weird, way too coarse and dark for the arms, esp the upper arms! They are also very patchy. This is not necessarily an indication of poor treatment - I was always competely bald for 6 weeks after treatment and never had missed patches. I can only imagine it is something to do with the highest energy being at the center of the spot, whereas there is lighter energy at the edges. Overlapping spots might eliminate this problem.
Other info about my situation - I am female and have a lot of hair for genetic reasons. Fine but noticeable brown fuzz all over my torso and buttocks, thicker hair on legs. Laser hair stimulation is a funny and unpredictable phenomenon. My laser tech was lovely (although clearly ill-informed) and used to throw in other areas for free occasionally - so I had laser on peach fuzz on my lower back and on my areolas a couple times. No stimulation there, despite the hair being finer than on my arms.
Bottom line is that laser is just unpredictable on areas which are not dense, coarse and dark - i.e. lower legs, underarms and bikini on most women. Even if hair is not stimulated (and most likely you’d be ok - I know I’m unusual) it is possible to be left with patchiness. so, If you decide to take the plunge, be militant about overlapping spots, high settings, before and after photos, and ice adjacent areas (i.e. your upper arms) to avoid stimulation there. If you upload photos to this site, then the laser experts can give their advice about the texture and color of your hair.
Let me know if I can help any more.