I want to know about ed and how it can be cured?

Many possibles: ED can have many sources. The most common by far is psychological. While difficult to hear, there usually is a underlying issue that impedes your erections. If you can masturbate without difficulty, then it is probably not a physical problem. There are also physical problems that can cause it, high blood pressure, certain medications, peripheral vascular disease. See your doctor for a work up.