Causes of erection problems Most men occasionally fail to get or keep an erection. This is usually caused by stress, tiredness, anxiety or drinking too much alcohol, and its nothing to worry about. If it happens more often, it may be caused by physical health or emotional problems.

What causes a man not to erect sometimes?

ED is usually caused by low blood flow to the penis or a problem with the nerves that control erections. This is a result of other conditions, such as hardening of the arteries, high blood pressure, and high cholesterol or diabetes.

What can a man use instead of Viagra?

Alternative medications for erectile dysfunction (ED)Tadalafil (Cialis) Cialis is an oral tablet that starts to work about half an hour after you take it. Vardenafil (Levitra) You should take Levitra about one hour before sexual activity. Vardenafil (Staxyn) Avanafil (Stendra)