Mature hairline erosion
https://healthell.blogspot.com/2021/12/mature-hairline-erosion.html
When a hairline is maturing can thinning go past the leading edge as long as it is contained within the ‘mature hairline’ region. I have some erosion at the very front of my hairline and don’t know if I should be worried The answer is that balding, when it starts in a mature hairline, may start with miniaturization and erosion of the hairline...
from BaldingBlog - Hair Loss Info https://ift.tt/3IBUOgc