Chronic venous disease affects one quarter of the population and is routinely examined with Doppler ultrasound. The veins are evaluated in terms of diameter, compressibility and blood flow. The examination is performed with the patient in the standing position but can be complemented in the supine position, if disease of the deep veins is suspected. New angle-independent ultrasound techniques may contribute with more complex visualization of the blood flow and may in the future replace Doppler ultrasound in some areas of vein diagnostics.