The primary Raynaud's syndrome can trigger by exposure to

• Blood vessels narrow immensely in response to certain situations which limits the blood supply to some parts of the body such as fingers, toes, ears or nose. The reasons are not known.
• Cold weather
• Stress
• The secondary Raynaud's syndrome can be symptom of certain disease conditions.
• They are usually associated with disease conditions such as lupus, scleroderma, rheumatoid arthritis, or atherosclerosis.

• Wear warm, comfortable clothing including socks.
• During an attack, warm the hands and feet by rubbing them against each other or against a warm surface.
• Try meditation or yoga to manage emotional stress.

Rarely, in severe cases, decreased blood circulation can cause tissue damage in the fingers or toes.

Treatment aims at reducing the severity and duration of attacks, and treat the underlying cause. Warm clothing is effective in preventing mild symptoms.

Medication

Calcium channel blockers: These widen little veins in hands and feet, diminishing the recurrence and seriousness of attacks.

Nifedipine . Amlodipine

Alpha blockers: Balance the activities of norepinephrine, a hormone that contracts veins.

Prazosin . Doxazosin

Vasodilators: Relax the blood vessels.

Nitroglycerin

Sedatives/neurotoxin: Injections to block sympathetic nerves in the affected hands or feet.

Onabotulinum toxin A