These scales are bent. It happens when a snake has a tight fitting hide and tends to lay with a turn the same direction often. It is normal and no issue at all. They will straighten on their own or after a shed. It is not a scar or a humidity issue. It is just a bent scale. Similar to people whom abrade hair due to repetitive action. (like the top of my leg rubbing against my pants all day in front of the computer.)