You should definitely buy the single needles for intensive scar treatment.
The scar in the crease is really difficult to roll intensively with a roller.
Needle the scar with the single needles very thoroughly and densely every four weeks until you achieve results.
First, roll the area with the 1.5 mm roller, then immediately afterwards or when you have time, needle them.
You can use the 0.5 mm dermaroller too but wait until the needling has healed.
It is difficult to use a roller under breast crease. You should lift your breast with one hand and roll only up and down (direction back and forth towards the nipple). When you go back and forth, lift the roller before each movement to avoid the needles going back into the same pricks.
Surgery scars - apply Infadolan immediately after dermarolling and about ten days afterwards to keep the needled scar occluded. Just a little Infadolan is enough.
Mondor's Cords are inflamed veins and you should not roll over them if they are not healed.
The instructions for the one liner mean to say that you can roll every day but every day a different scar. Many customers have dozens of stretch marks and they cannot roll them all properly with the one liner in one go. They roll several stretch marks per day but every day different ones. You have
only two scars so that is easy.