It is caused by poor circulation of the blood to the affected area.

It was a small, cramped room, with poor circulation of air and no windows.

Blood vessels (leading to strokes and poor circulation in your legs).

What's more, poor circulation in the skin may exacerbate the problem.

Chilblains are caused by poor circulation in response to the cold.

Felici's skin was cold to the touch, his circulation poor.

High cholesterol increases your chance of heart disease, stroke, and poor circulation.

People who have poor circulation in the arteries of the legs.

Heart and blood vessel problems, leading to poor circulation or low blood pressure.

My grandmother has poor circulation, so she is very sensitive to cold.