###Human: Can I use Heparin cream for visible and painful penis veins? ###Assistant: Hello. There are always large veins on the upper aspect of the penis, and they transport blood back towards the heart. Since the penis is an erectile organ, the veins have to be large and zigzag (tortuous), so they can elongate when the penis becomes erect. Sometimes the pain may occur due to rough masturbation. Please do not use Heparin cream as it is not needed. Avoid rough masturbation for a few days. Take care.