This started around one month back and hasn't happened to me ever before. The skin on my lips and around my mouth becomes very dry. Not like chapped lips, but the corners of my mouth cracks and becomes painful and my lips become numb (when i touch it feels like there's a smooth dry layer on top). I tried Boroplus and Boroline, it heals for some time and returns again after stopping. I am taking iron,
B12 and D3 supplements regularly. My recent blood test of B12, D3,
TSH, T3 and T4 was normal. I have PCOS but symptoms are under control. My cholesterol was borderline high and
HbA1C was 0.1 outside normal range. What could be causing the lips/mouth dryness and how to stop it?