About 30 different nail signs may be associated with medical conditions.
Round and bulbous fingertips causing nails to curve around.
Possible causes: Emphysema and other lung conditions.
Small dents or pits in the nail.
Possible causes: Arthritis, psoriatic arthritis, or eczema.
Horizontal indents in the nail.
Possible causes: Severe malnutrition, chemotherapy, nail injury, or even extreme altitude exposure.
Nails begins to bend upwards like a spoon.
Possible causes: Iron deficiency.
Nail begins to separate from nail bed.
Possible causes: Thyroid disease, graves disease, lupus, other autoimmune diseases.
HALF AND HALF NAILS
Discolored so that one part is white and the other is pink or darker.
Possible causes: Kidney and liver issues.
Disclaimer: If you think you have any of these conditions, go see a doctor.