Flaky and dry skin, acne marks. Help.

I have extremely dry and flaky skin around my nose, upper lip, lower lip and chin area. The corners of my lips get so dry that whenever I try to open my mouth it hurts. There's a burning sensation at the corners and after a few days the area becomes pigmented, a deep brown colour. These things get worse during the winters. I always keep the corners of my lips moisturized but one I wash my face it gets back to square one. Small and large Flakes of skin starts to form around my nose and mouth everyday. Doesn't go away no matter whatever I do. I always had dry skin during winters but not this much. This has gotten worse the past 2 years. I always moisturize my entire face with nivea soft moisturizer after I've done cleansing with Himalaya's neem face wash. I also get 3-4 acne spots every month. After they've healed it leaves a dark spot. Doesn't go away. Please help.