What do you suggest if i'm 20 years old, diabetic and for the last two weeks i can't sustain an erection help!?

May be...: Inability to sustain erection to complete intercourse indicates the coherent working ability of your muscles, nerves, and circulation for erection has slowly depleted to the level not capable enough. Such a process is a lifelong making and moves in a highly variable pace among individuals, and related with the combination of genetic factors, lifestyle, diseases like dm, drugs, etc. See urologist.