Raynaud's Syndrome

Have suffered injuries or frostbite in the feet and hands.

■ Be suffering from a autoimmune disease such as scleroderma, the disease Sharp, Sjögren syndrome, lupus.

■ suffer from rheumatoid arthritis, carpal tunnel syndrome, atherosclerosis, thyroid disease or Buerger's disease.

■ Work in some business sectors.
- With tools that generate vibrations.
- In fish markets (alternating hot and cold).
- Exposure to vinyl chloride (plastics industry).
- Subjected to repeated minor trauma to hands, work the keyboard, the piano in the body or in the tiling.

■ Use of drugs that have the effect of contracting blood vessels (beta-blockers, some chemotherapy treatments, and against migraine).