Blue or grey skin or lips (cyanosis)

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

How to tell if you have blue or grey skin or lips (cyanosis)

If you have cyanosis, you may notice a blue or grey colour on your:

• lips
• tongue
• gums
• skin (on black or brown skin this may be easier to see on the palms of the hands or the soles of the feet)
• ears
• under your nails

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

Causes of blue or grey skin or lips (cyanosis)

Blue or grey skin or lips (cyanosis) happens when there's not enough oxygen in your blood, or you have poor blood circulation.

It can be caused by a serious problem with the:

• lungs, like asthma or pneumonia
• airways like choking or croup
• heart, like heart failure or congenital heart disease

Other causes of cyanosis include:

• Raynaud's , which affects your fingers and toes
• beta blockers , a medicine used to treat high blood pressure
• a blood clot that stops the blood supply to or from a limb
• being in cold air or water
• wearing clothing or jewellery that's too tight

Treatment for blue or grey skin or lips (cyanosis)

Cyanosis is a symptom of many different conditions.

Treatment depends on the cause.