...and can be quite painful. To relieve pain it is best to leave the nipple out as even loose fitting clothing can cause irritation to a nipple during a Vasospasm. The vasospasm is the white part as pictured and can become more white as it develops. When the vessels go back to normal the nipple goes back to it’s original appearance and the irritation and pain subside. If the pain does not go away after nipple reverts to its original color it is time to see your doctor to rule out any underlying conditions such as a thrush infection.