👉 Case veins are small, thin-walled blood vessels that appear on the surface of the skin, usually in areas where larger veins lie beneath. They are often visible as fine lines or dots, and are caused by the leakage of blood from deeper veins into the skin's outer layers. Case veins are more common in people with darker skin tones and can be a sign of underlying venous insufficiency or other circulatory problems. They are typically harmless but can sometimes indicate a need for medical attention.
