Veins are blood veins vessels that come back deoxygenated blood veins from the external parts of the body back to the respiratory system and heart. When veins become unusually dense, full of changes and changes, or increased, they are called glowing blue veins. Abnormal veins are a very common condition. The phrase "varicose" is produced from the Latina main term "varix," which is converted in British as "twisted." Abnormal veins are inflammed and increased veins which usually appear glowing blue or dark violet in color. They may also be irregular, huge, or turned in overall look.