A 30-year-old man presented to the genitourinary medicine clinic with the sudden appearance of an asymptomatic, 2 mm wide, flesh-colored, firm, and cord-like lesion encircling the coronal sulcus circumferentially following vigorous sexual intercourse with his wife. An initial diagnosis of sexually transmitted disease-associated penile swelling was entertained. He was given antibiotics for this condition. Failure of resolution and negative screening tests for sexually transmitted diseases prompted a skin biopsy and extensive literature search, with an ultimate diagnosis of nonvenereal sclerosing lymphangitis of the penis, a rare, self-limiting condition. Reassurance and abstinence of sexual intercourse for a few weeks led to complete recovery.