your T-zone is oily (Forehead and nose) compared to your U-zone (cheek and jawline). The. winter rates could be because of seborrheic dermatitis. Dry patch on chin - round the year or any exacerbating factors? since when? itching or burning over it? anywhere else on body? tanning is common in Indian skin type especially in those with wheatish complexion and darker shades. Hope I have managed to give some clarity. Kindly do not delay the treatment and get a consultation done with a qualified dermatologist how are you can get an online consultation privately with pictures if you wish. Hope this is helpful.Hope this was helpful.