CHOOSING THE RIGHT NEEDLE LENGTH
When ordering your roller, you will need to choose the needle length that is correct for you and the skin condition that you are treating. The common lengths are: 0.2mm, 0.3mm, 0.5mm, 1mm and 1.5mm.
0.5mm (Home Use)
The 0.5mm roller is ideal for facial skin, for anti-aging purposes and for treating light acne-scarring or hyper-pigmentation. This is the minimum length that inducts collagen.
Minimal Pain. Most people can manage without a topical anesthetic.
Use it 2-3 times a week, at least in the first 3 months, otherwise in my experience you will not see results.
After treatment, you can expect an inflammation (reddening) of the skin which usually lasts for a few hours but sometimes can last up to 48 hours.
1.0mm (Professional Use)
Recommended for Professional Use Only
This is the maximum length to use on the face, at least for women whose skin is naturally thinner than men's. On the body, a 1mm roller can also be used for light stretch marks.
Can be quite painful, so applying a topical anesthetic is recommended.
Use once every week if used lightly, or once every 2 weeks if used vigorously.
Skin will be reddish for 1-3 days.
1.5mm (Professional Use)
Recommended for Professional Use Only)
Recommended for use on the body for scars and for deeper stretch-marks.
Usually too painful to use without a topical anesthetic.
A minimum of 3 weeks interval between treatments is recommended, even if it looks like your skin has completely healed. Some websites even suggest 4-6 weeks.
When treating stretch marks, do not expect miracles! - it takes a long time to see even initial results.
Personally, it took me 4-5 months to fade my own stretch marks by approx. 25%. The good news is that even at this relatively small percentage of improvement the different is evident - and already will make you feel more confident about your appearance.
Expect the skin to become red and possibly sensitive to the touch for up to a week.
2.0mm and 3.00mm (Professional Use)
Recommended for Professional Use only.
Recommended for use on males treating deep stretch marks or scars on their fleshier parts (like thighs and buttocks) or on the back.
0.2mm, 0.25mm and 0.3mm (Home Use)
At these lengths only the epidermis (the outermost layer of the skin) is affected, and therefore there is no induction of collagen.
While useless for anti-aging purposes, the 0.2mm and 0.3mm rollers can, on the other hand, enhance the penetration of applied cosmetic creams. Other advantages are that they can be used daily (or even twice daily) and that they are totally pain-free.