Erectile dysfunction (ED), also referred to as impotence, is the inability to attain or maintain an erection sufficient for successful ***** activity. Normally, an erection occurs when the arteries carrying blood to the ***** widen, allowing more blood to flow in, and the veins carrying blood away from the ***** are compressed, restricting blood from flowing out. In other words, more blood flows in and less flows out, making the ***** larger and causing an erection. Certain nerves and hormones in the body also play a role in initiating and maintaining an erection. Any abnormality involving nervous or hormonal systems, whether due to medication or disease, may affect the ability to develop and sustain an erection, to ejaculate, and to experience *****. What Causes Erectile Dysfunction? Erectile dysfunction can be caused by any number of physical and psychological factors. Contact Us: - Dr Raina's SAFE HANDS E-34, EKTA APARTMENT, Saket, Near Opposite, Malviya Nagar Metro Station, New Delhi – 110017 Help Line: +91-7687878787