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Title: Had to stop using it
Review: I started using Boots No. 7 and within a week developed sensitive lips and tongue numbness. My lips felt as if they had been burnt. I had to constantly apply lip balm and vaseline to help with the discomfort. It was almost two months after I started using the serum that I realized it was causing my lip sensitivity. Even though I liked the smoothness the serum gave my skin, I immediately stopped using it. Within two weeks, my lips were back to normal. I don't know what ingredient in the serum caused my sensitivity, but be aware if you start using it.
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