Ladies and gentlemen, if your manicurist ever sees a fingernail like this one in the picture below, it is time to have a talk about IRON DEFICIENCY ANEMIA and also time for you to eat more spinach with other green leafy vegetables and/or see your primary care clinician.
Once upon a time, part of a patient's Physical Exam included a visual examination of hair, skin and NAILS instead of just advising the patient to take the multivitamin called Hair Skin and Nails.
Remember the word 'Doctor' means 'Teacher', so I taught my manicurist to teach her clients how to recognize a potential metabolic disorder using her expertise of seeing nails on a daily basis.