Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs. What is an overnight erection test? Mehmet Oz, MD. Cardiology Cardiovascular Disease.
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Tests for erection problems can help find out why a man can't have or maintain an erection. This problem is called erectile dysfunction , or impotence. It's a common male problem. Most erection problems are caused by a mix of blood vessel, nerve, or psychological issues. To find the cause, your doctor will first ask about your sexual history and do a physical exam.