what is raynaud disease
Definition. Raynaud's (ray-NOHZ) disease causes some areas of your body â such as your fingers and toes â to feel numb and cold in response to cold temperatures or stress. In Raynaud's disease, smaller arteries that supply blood to your skin narrow, limiting blood circulation to affected areas (vasospasm). Women are more likely than men to have Raynaud's disease, also known as Raynaud or Raynaud's phenomenon or syndrome.