I have been noticing some white patches on my chin since two months. I've been spending a lot of time outdoors, traveling. As my skin is very sensitive, when I use sunscreen my face breaks out badly but when I don't the white patches are more prominent. Recently, I started using La Roche Posay ultra fluid sunscreen for sensitive skin 60spf, breakout is less with this but still not normal. White patches don't seem to reduce though. Kindly advise.