See a doctor to identify and treat the underlying cause
Improve blood sugar control if you have diabetes
Control blood pressure and cholesterol
Quit smoking
Limit alcohol use
Exercise regularly
Lose excess weight if needed
Sleep enough and treat sleep apnea
Reduce stress and manage anxiety
Address depression and relationship issues
Review medications with a doctor
Use oral ED medicines if prescribed
Try vacuum erection devices
Consider penile injections if prescribed
Consider urethral suppositories if prescribed
Consider hormone therapy if low testosterone is confirmed
Consider counseling or sex therapy
Treat vascular or nerve problems when possible
Consider penile implants if other treatments fail