4-5 months ago I noticed what looked like a shadow on my upper lip. I’m not sure it’s melasma; the skin is more gray than brown. It’s a recent development but I don’t know what’s changed. I haven’t been on BC for several yrs and I’m not pregnant. I wear 50 spf zinc oxide. I don’t spend much time in the sun. Ive tried progressively more aggressive otc remedies (turmeric, kojic acid, retinol, hydroquinone) with no progress. What’s causing this and how do i fix it? Very frustrating...