The veins and their tributaries are collectively called the venous system. The other part of the circulation is the arterial system.
Varicose veins, swollen tortuous veins, are called varices in medical terms.
Venopathy; phlebopathy
Blood vessels
varicocele
Varicose Veins.
The answer to that is varicose veins.
Hemorrhoidectomy
A vascular surgeon specializes in the treatment of veins.
Hemorrhoids are dilated or varicose veins of the rectum or anus. They can be painful or painless.
Sclerotherapy is a commonly used treatment of spider vein.
lipedema
Bart syndrome is the medical term used to describe absence of skin. The disease is inherited by autosomal dominant transmission.