I’ve heard all sorts of things about nails too. From what I understand, while some nail “wisdom” is definitely outdated, nails can actually give clues about your health. That whole white spot thing being about calcium? Seems like that’s mostly a myth, and it’s more likely from minor injuries.

The article mentions some concerning changes, like:

• Clubbing: Where your nail beds soften and the angle between the nail and finger disappears. It’s serious and related to low oxygen levels.
• White nails: This is whole nail only white, not white spots it’s related to liver or kidney problem.
• Blue nails: Can mean you’re not getting enough oxygen.
• Dark lines: Could be a sign of skin cancer (melanoma).
• Bleeding that doesn’t heal: Might indicate vasculitis or a heart valve infection.
• Yellow or White discoloration: Most of time are fungal infection.
• Spoon-shaped nails (Koilonychia): Potential sign of anemia or iron deficiency.
• Beau’s lines (horizontal ridges): Might point to deficiencies or other conditions.

Honestly, if you’re seeing any of those things, or just a persistent change in color, shape, or thickness that’s not from an obvious injury, it’s best to get it checked by a doctor. It’s probably nothing, but it’s better to be safe than sorry!