Suddenly the blood vessels on the hands become blue, which may be caused by emotional excitement, external environmental stimulation, thrombosed superficial phlebitis and so on.
1. Emotional excitement: When you are too emotional, or when you move heavy objects with force, there will be blood vessel dilatation, and you can see the blood vessels on your hands turn blue.
2. External environmental stimulation: When the external environment changes suddenly, such as in winter, from warm indoor to cold outdoor, the hand warming measures are not enough, so that the hand is frozen, there will be blood vessel greening performance.
3. Thrombophlebitis: If the blood circulation in the hand is not good and there is thrombosis, it will cause thrombophlebitis, and the blood vessels in the hand will turn blue, usually accompanied by pain.
If the blood vessels on your hands suddenly turn blue, you can apply hot compresses to relieve them, and if they are not relieved for a long time or if you have pain symptoms, you should consult a doctor in time for treatment.