Why your hands or fingers turn blue: Understanding peripheral cyanosis, causes, and what it says about blood flow

Bluish hands, known as peripheral cyanosis, can be a harmless response to cold but may signal poor circulation or serious heart and lung issues if persistent. While cold exposure is common, conditions like Raynaud’s phenomenon, heart problems, or blood vessel blockages require medical attention. Seek advice if discolouration persists or is accompanied by pain or fatigue.