Why am I getting box scars on my checks even that I don't have any active acne around that area? (photos)

Im in my late 20s and in the last couple year, especially lately during winter months, my skin keeps creating new boxing scar on both side of my cheeks. I dont have any acne on that area for long time, just a bit of large pores. They started as a faded color of skin texture and go deeper over few weeks until it forms a deep scar. My skincare routine is cleanser, toner and serum such as hyluoric acid, cream and daytime I have biotherm serum, moisturizer n sunscreen Really want to know the reason why