Why there is pallor in anaemia?

Pallor in anemia occurs due to a decreased concentration of hemoglobin in the blood, which reduces the oxygen-carrying capacity and leads to less oxygen being delivered to tissues. As a result, blood vessels can appear less red, causing a paler complexion. Additionally, the body may redirect blood flow to vital organs, further contributing to reduced color in the skin. This overall deficiency in red blood cells or hemoglobin manifests visibly as pallor.