Finally, I discovered the cause of my allergy near my upper lip. Not lipsticks or skincare; but seafood. When I ate prawns, the very next day I would have red dry patches on corners of my lip. Not so sure on other seashells because I seldom eat them. Prawns are common in most food like seafood noodle, laksa and fried noodle here.
It has been like this when I was pregnant with my first child. Since then, it has never heal regardless of how doctors and creams I tried. So, I just got to control it by eating less seafood.
Many women I know also have such allergy. Funny thing is it only appeared on upper lip. A staff of mine has such allergy since she was young but once she was pregnant and delivered, her allergy gone. Hormonal change I said. So good!!!