Zoom in here, and you see that the thumb nail left has a massive damage (rib crosswise).
Maybe that's one reason for the way she usually grabs her clutch, with the thumbs in the back and all eight other fingers in front: to hide the thumbs.
Could be artificial nails disaster, but who knows? Malnourishment can also cause nail damage like ribs (crosswise or along) or white spots, or part of the nail peeling.
Her dieting is the reason.
I wonder if her thyroid works properly...
Saw on YouTube that us, peasants wear nail polish, but princesses, no no no!
The list of Don'ts at the Windsors are unbereable.
Honestly I prefer, a well done manicure and dark or light nail polish, that nothing.