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What are the changes in nail colour?

 The following changes in nail colour is noted in various conditions
Lindsay Nail 
It is characterised by proximal dull white portion and a distal pink or brown portion with a well-demarcated transverse line of separation. Seen in Uraemia
White Nail (Terry Nail)
It is characterised by white color in the nail bed than the nail plate.
Causes of white nail are 
  • Anaemia
  • Hypoalbuminaemia (cirrhosis, nephrosis)
  • Diabetes mellitus
  • CCF
  • Rheumatoid arthritis
  • Malignancy.
Red Nail
Congestive cardiac failure.
Blue Nail
  • Wilson's disease (Copper deposits)
  • Silver deposits.
Black Nail 
  • Peutz-Jeghers syndrome
  • Cushing's syndrome
  • Addison's disease
Yellow Nail Syndrome
It is characterised by yellow finger and toe nails
clubbing and onycholysis.
The other associated features are: Edema of finger, ankle and face 
Infection-sinusitis, bronchitis, bronchiectasis, pleural effusion
Carcinoma of skin, Larynx, endometrium e Lymphoma