Suctioning should only be used on scars that very likely are tethered (the rolling type of acne scars) or on scars that have resisted all other treatments (in the latter case suctioning is experimental, as a last resort kind of self-treatment).
Needling does not cut the fibers but disrupts them and suctioning stretches them. Saline injections for example are done after a subcision but not always. Mere saline injection (without subcision) that just stretches the fibers sometimes improve indented scars. More about saline injections here:
https://http://forums.owndoc.com/dermarolling-microneedling/Saline-injections-for-acne-scars Needling the skin prior to suctioning makes bruising after suctioning almost inevitable. Getting bruises may further help improving scars because autologous blood injections were found to improve scars:
https://http://forums.owndoc.com/dermarolling-microneedling/autologous-%28own%29-blood-injection-for-acne-scars-or-atrophic-scars/ Nothing prevents you from going to a doctor for a real subcision but our website is aimed at self-treatment and real horizontal subcision to cut the fibers is too risky to be done as self-treatment. It can leave scars.
I understand that it is difficult to walk around with bruises. You should try everything else first and only if it doesn’t help, add suctioning.
Scars are in general very difficult to improve with all current methods, even the most advanced and expensive ones. A combination of approaches is often necessary. Unfortunately, there is no magic solution and if nothing works, you have to start with "try and see" methods until you basically exhausted your options.
Many of our customers spent thousands of dollars on laser treatments or acid peels without any improvement. If the suction method does not improve your scars, you lost 19 dollars.