poor circulation; lack of blood flow
Medical and everyday term for insufficient blood circulation, often associated with cold hands/feet or numbness.
My hands and feet get cold due to poor circulation.
Exercise is effective for improving poor circulation.
血行不良 is a near-synonym also meaning 'poor circulation'; 血行不足 emphasizes insufficiency, while 血行不良 suggests a more general unhealthy state of circulation.
Compound of 血行 (blood circulation) and 不足 (insufficiency, lack).