PATHOLOGY

Detailed explanation-1: -It is a common myth that veins are blue because they carry deoxygenated blood. Blood in the human body is red regardless of how oxygen-rich it is, but the shade of red may vary. The level or amount of oxygen in the blood determines the hue of red. As blood leaves the heart and is oxygen-rich, it is bright red.

Detailed explanation-2: -Blood is always red. Blood that has been oxygenated (mostly flowing through the arteries) is bright red and blood that has lost its oxygen (mostly flowing through the veins) is dark red. Anyone who has donated blood or had their blood drawn by a nurse can attest that deoxygenated blood is dark red and not blue.

Detailed explanation-3: -Reasons That Veins Are Blue The primary reason veins are blue is the way wavelengths of light hit the skin. White light can carry colors and waves with varying lengths. Red has the ability to travel the farthest. Violet waves are the shortest, and all the other colors fall somewhere in between.

Detailed explanation-4: -If your visible blue veins are not accompanied with any additional symptoms, they are likely spider veins. Although they are not a cause for medical concern, spider veins may cause people to feel self-conscious about the areas where they appear. Luckily, spider veins can easily be treated to be less visible.