Erectile dysfunction (ED) or impotence is sexual dysfunction characterised by the inability to develop or maintain an erection of the penis during sexual activity in humans.
Physical causes
Heart disease
Clogged blood vessels (atherosclerosis)
High cholesterol
High blood pressure
Diabetes
Obesity
Metabolic syndrome — a condition involving increased blood pressure, high insulin levels, body fat around the waist and high cholesterol
Parkinson's disease
Multiple sclerosis
Development of scar tissue inside the penis
Certain prescription medications
Tobacco use
Alcoholism and other forms of substance abuse
Sleep disorders
Treatments for prostate cancer or enlarged prostate
Surgeries or injuries that affect the pelvic area or spinal cord
Psychological causes
Depression, anxiety or other mental health conditions
Stress
Relationship problems due to stress, poor communication or other concerns