Can indicate low oxygen levels in the blood.
Sometimes associated with heart or lung conditions.
If paired with shortness of breath, chest discomfort, or fatigue, seek prompt medical attention.
4. Dark Lines Under the Nail
Vertical streaks can be harmless, especially in people with darker skin tones.
Sudden appearance, spreading, or changes in shape should be evaluated to rule out melanoma.
5. Brittle, Cracked, or Peeling Nails
Often due to frequent handwashing or chemical exposure.
Persistent brittleness may be linked to thyroid disorders or vitamin deficiencies (iron, biotin).
If nails break easily despite good care, a check-up may help uncover the cause.
6. Spoon-Shaped Nails (Koilonychia)
Upward-curving nails may be associated with iron deficiency anemia.
If paired with fatigue or weakness, consider testing iron levels.
7. Clubbing (Rounded, Enlarged Nail Tips)
Fingertips enlarge and nails curve downward over time.
Sometimes linked to lung or heart disease.
Because it develops gradually, many don’t notice right away—medical evaluation is recommended.
8. Horizontal Grooves (Beau’s Lines)
Deep grooves may appear after severe stress, illness, or infection.
They indicate nail growth temporarily stopped.
