Blood flow to the penis is a critical component of healthy erections. Men achieve an erection when sexual arousal gives rise to nerve impulses that tell the muscle fibers in the penis to relax. The chemical that causes the muscle fibers to relax is called nitric oxide. Once the muscles relax, it allows blood to flow into the penis, fill the open spaces, expand it, and make it stiff. Therefore, penis blood flow is the natural process by which erections occur. How to increase blood flow to the penis? Do diet and vitamins help? Are there medications and mechanical devices available?
For more information, check out our “Guide to Erectile Dysfunction“.