What is Raynaud’s? Raynaud's phenomenon (usually just called Raynaud's) is a common condition of the blood vessels that supply blood to the skin. During a Raynaud's attack, the blood vessels narrow, reducing blood flow to the hands. They first become white and dead looking. They may then turn blue and finally red and burning when the blood flow is restored. There may be considerable pain, numbness or tingling. What is scleroderma? Scleroderma is an uncommon disease of the blood vessels, the immune system and the connective tissue. The skin, usually of the hands and feet may become thickened, tough, tight and leathery. In addition to affecting the fingers, the fibrosis may spread to other areas and organs of the body. The arms, face, trunk and legs may be involved and movement of the limbs may become limited. Damage to the blood vessels is usually seen in the form of severe Raynaud’s, painful pits or scars on the finger tips, telangiectasia and ulcers. These are external signs of scleroderma but internal vascular damage may also occur.