The size of the needles on derma rollers varies. Larger needles (0.5 mm) should only be used once or twice a week. Smaller, 0.25 mm needles can be used more often.

Using derma rollers improperly can damage skin . According to Zeichner, the difference between at-home rollers and professional microneedling services is the depth of needle penetration.

When buying a derma roller, the first thing you have to consider is the needle size. If you poke around on Amazon, you’ll notice that they come in a variety of sizes: anywhere from 0.2 to 1 ...

If you are using a derma roller it is important to ensure that it is clean to reduce the risk of growing bacteria and causing a skin infection. Prepare your skin. Ensure your skin is well-cleansed ...