I tried using it first after washing my face, then the sheet mask, and there was no tingling sensation, either when I first started applying it or when I layered on the mask. The next morning, my skin felt calmer, and the breakouts I had the day before had subsided. My pores didn't seem to have changed, and they seemed a little less noticeable, like the day after applying expensive Dr. K's Vitamin C. Before using it, I was hesitant, watching videos with mixed reviews and considering throwing it away, but it might actually work for me. My family member with dry skin experienced some severe skin irritation after using it continuously, so I plan to use it every few days.