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Blue skin or lips (cyanosis)

Cyanosis is where your skin or lips turn blue. It can be a sign of a serious problem.

You may notice a blue colour on your:

If you have dark skin, cyanosis may be easier to see:

Your hands and feet are usually a normal temperature unless you also have poor blood circulation.

Cyanosis can mean there's not enough oxygen in your blood, or you have poor blood circulation. It can be caused by a serious problem with the:

Other causes of cyanosis include:

Cyanosis is a symptom of many different conditions.

Treatment depends on the cause.