hey , Heart disease Clogged blood vessels (atherosclerosis) High cholesterol High blood pressure Diabetes Obesity Peyronie's disease — development of scar tissue inside the penis Certain prescription medications Tobacco use Alcoholism and other forms of substance abuse Sleep disorders Psychological causes of erectile dysfunction These include: Depression, anxiety or other mental health conditions Stress Relationship problems due to stress, poor communication or other concerns  , consult neurologist if you have organic problem ,consult psychiatrist if its psychological