Question

cause swelling and sometime discoloration of the skin​

Answer 1

Answer:

Many conditions can cause your skin to have a bluish tint. For example, bruises and varicose veins can appear blue in color. Poor circulation or inadequate oxygen levels in your blood stream can also cause your skin to turn bluish. This skin discoloration is also known as cyanosis.

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Answer 2

Answer:

A bluish color to the skin or mucous membrane is usually due to a lack of oxygen in the blood. The medical term is cyanosis.