Apparently these can sometimes give you information about something wrong with your health.
it's easy to find some info about this when you google.
I think i used to have these when i was younger, now i don't have them at all, I don't need to make pictures, you may have noticed this when watching some of my videos:
https://youtu.be/y4ly1mHFRtk?t=356 I have known this for some time. When i asked about this to my modern medicine doctor she said it's normal (I knew she was going to say this).
Another simple diagnostic method is thinning of the eyebrows (at the outside), which apparently can be a sign of hypothyroidism and other problems. You can google this. My eyebrows are definitely very thinned out. Wow. I have never heard a doctor mention this ever.
What an eye opener :)
I already made it a habit looking at the fingernails of practitioners to see if they are any good at helping themselves. I noticed at least one had no lunalu either, that made me distrust this one from the start.