What are the causes of raynauds syndrome?

Usually cold. Raynauds involves cold or stress induced vasospasm of small vessels in hands and feet. It is really more of an annoyance than a harmful problem. Calcium channel blockers are the most common medication that physicians use to treat the symptoms of raynauds. The main drawback is the side effects from these medicines. Keeping your hands and feet warm remains the best treatment.
Sporadic. Raynauds is a sporadic disease. Occurs in response to cold environment and stressful situations. Treatment possible but need to see someone familiar with process.