Ok so I've had this derma roller from MTS 1.5mm for at least 2 yrs but never used it because it looked scary. Lately I've noticed my skin pores large and acne scars more noticeable and my make up didn't go as smooth as before so I decided to give it a go. I rolled it on my cheeks 10x in each direction didn't use much force since it was my first time. I first washed my face w baking soda and water as that is my new exfoliator; pat dried and began roiling. My skin became a bit swollen and red an tingling but was not very painful. I applied some aloe vera lotion to calm it a bit. Hopefully it works since I hate going to doctors/spas.