The causes of erection problems vary. Difficulty getting and keeping an erection isn't reserved for middle-aged men. Even younger men can experience occasional libido malfunctions. If erection problems are ongoing and endangering your relationship, then it's time to look at the factors that might cause it. If you can't get an erection after a long hectic day at work or a night out drinking, it's not a cause for concern. However, if stress, fatigue, physical weakness or injury impedes the parasympathetic system that triggers the erection process, the condition could become permanent unless you deal with it.

IuriiSokolov/iStock/Getty Images

The causes of erection problems vary. Difficulty getting and keeping an erection isn't reserved for middle-aged men. Even younger men can experience occasional libido malfunctions. If erection problems are ongoing and endangering your relationship, then it's time to look at the factors that might cause it. If you can't get an erection after a long hectic day at work or a night out drinking, it's not a cause for concern. However, if stress, fatigue, physical weakness or injury impedes the parasympathetic system that triggers the erection process, the condition could become permanent unless you deal with it.