Definition of Raynaud's phenomenon:
Raynaudâ ' s phenomenon is a condition in which cold temperatures or strong emotions cause blood vessel spasms that block blood flow to the fingers, toes, ears, and nose.
Causes, incidence, and risk factors:
Raynaud's phenomenon can be associated with diseases of the arteries such as:
Other causes of Raynaud's phenomenon may include:
- Repeated injury, particularly from vibrations such as those caused by typing or playing the piano
- Overdose of of certain medicines, including ergot compounds and methysergide
- Smoking
