The next morning my face felt a little tight when I woke up and it was a bit red and blotchy. I washed my face that morning and it felt very dry. I repeated this process on Monday night. By Tuesday evening my skin was very dry, tight, and leathery feeling. I thought that this might just be the way it worked. I applied the serum again on Tuesday night and the stinging was now a burning sensation. When I went to apply my moisturizer it was a full on fire on my face. Today is Wednesday and my face hurts, it's dry, tight, and peeling. This bottle now resides in my trash can and I'm very glad I did not pay full price.