Why is your dwarf hamster tail red?

A dwarf hamster's tail can appear red due to the presence of blood vessels near the surface of the skin, which can create a reddish hue, especially when the hamster is excited or active. Additionally, some species of dwarf hamsters naturally have more pigmented tails than others. If the redness is accompanied by swelling or other signs of distress, it might indicate a health issue, and a veterinarian should be consulted.