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Alterations in colour of skin

Alterations in colour of skin is seen in following conditions
Pigmentation of skin vary from dark skinned to fair individuals depending on the race to which they belong
Pale skin -Pallor
Is seen anemia, hypopituitarism, CRF
In pallor the patient appears pale,it is seen over the skin, mucous membranes, lower palpebral conjunctiva, finger nails and palms of thehands. Loss of pigmentation of the palmar creases of the hands gives a clue that the Hb may be less than 7 gm% .
Bluish discoloration—cyanosis
Yellow pigmentation of the skin is seen in 
  • Jaundice is the yellowish discoloration of the skin ,mucous  membranes' and the sclera seen  when the serum bilirubin exeeds 2mg percentage
  • Carotenerma is due to excessive ingestion of carotene.It is associated with yellowish discolouration of skin and mucous membrane but sparing sclera
  • Lemon yellow discotoration of skin may be  seen in long standing severe anemia
Generalised Hyperpigmentation of skin 

Flushing of Skin (facial plethora)is seen in 
  • Chronic alcoholism.
  • Cushing's syndrome
  • Polycythemia
  • SVC syndrome
  • Chronic cor pulmonale.
  • Carcinoid syndrome