And in brown and black skin, the discolouration may appear as a darker ... but rarely leave a mark. Anthocyanins, found in berries, red cabbage and purple carrots, provide the deep reds, purples ...

Cellulitis causes various skin symptoms, including swelling, redness or discoloration, and pain. Doctors may mark out an area of skin that has developed cellulitis to monitor a person’s recovery.

A 63-year-old man presented with bluish-livid discoloration of the skin over the knee joint. Fourteen years previously he had undergone primary knee replacement. Clinical examination revealed ...