Sclerosing lymphangitis, also known as lymphangiosclerosis or sclerotic lymphangitis, is a skin condition characterized by a cordlike structure encircling the coronal sulcus of the penis, or running the length of the shaft, that has been attributed to trauma during vigorous sexual play.
The condition involves the hardening of a lymph vessel connected to a vein in the penis.
It can be felt as a hardened lump or "vein" even when the penis is flaccid, and is even more prominent during an erection.
This disorder is fairly common and most often occurs after vigorous sexual activity and resolves spontaneously.
Etiology of sclerosing lymphangitis is unknown but has been postulated to be secondary to thrombosis of lymphatic vessels.