One consideration would be penile vein thrombosis, which can increase the visability of the vein. This is sometimes known as Mondor's disease. An ultrasound can be considered for further evaluation and diagnosis.
Treatment can be done with NSAIDs and normally can resolve the symptoms in a few weeks to months.
If the symptoms worsen or continue despite conservative therapy, a urology referral can be considered for possible surgical therapy.
I would suggest a urology referral for another opinion.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b