What diseases cause raynaud's phenomenon?

Many disorders can. Many disorders can cause raynaud's phenomenon. Examples include: scleroderma, lupus, rheumatoid arthritis, sjogren's syndrome, atherosclerosis, subclavian aneurysm, beta-blocker drugs, ergotamine-type drugs, hypothyroidism, reflex sympathetic dystrophy, magnesium deficiency, etc...
Seen in CT disorders. Raynauds may occur just by itself or in association with several connective tissue diseases including scleroderma, lupus and ra. Lab testing for autoantibodies may be helpful in determining whether there is a predisposition to developing one of these underlying diseases.
None. Some diseases have raynauds associated but not caused by.

Related Questions

Raynaud phenomenon syndrome question. Is it really that or poor circulation?

See below. Raynaud's phenomenon describes a set of color changes in response to cold or stress. These are usually preventable and treatable. Poor circulation does not have those changes. Read more...
Color and location. Raynauds causes fingers to turn either white, blue and/or red usually in the cold. Poor circulation is different because it can affect palms and usually the border of the color change is a smooth transition. Raynauds usually has a distinct line between normal and blue /white. Read more...