Hi Dear Welcome to Health Care Magic Team. Understanding your concern. Lips become dry and chapped due excessive licking of lips along with dry climatic condition , which remove the natural moist layer from the lips .Hence cracks starts appearing on the lips which further become prone to fungal infection . The most probable cause of dark outline around your lips is hyper pigmentation which is generally caused by excessive exposure to the UV rays . Now i would like to suggest you that use petroleum jelly , drink lots of water ,avoid to stay in dry environment for longer period . Avoid using creams containing high steroid content ,wash your face with mild soap twice a day and avoid licking your lips . Use lip balm which can be directly applied rather than if you use finger it will cause spreading of infection again and again whenever you will apply with finger. As far as hyper pigmentation is concern avoid exposure to UV , cover your face while going outside or use crems with SPF factor apart from this healthy diet(green vegetables and fruits) containing lots of vitamins play miraculous role in treating hyper pigmentation. Hope your concern has been resolved.. Best Wishes, Dr.Harry Maheshwari