What disease is it when there is penile congestion at night accompanied by lower back pain?

Patient's question:

I am a male, 30 years old this year. In the past three months, when sleeping at night, I often wake up to find my penis erect, which makes me feel very uncomfortable. Additionally, there is aching pain in the middle of my back at night. Last week, I was unable to achieve full erection during sexual activity. Could you please tell me what the reason might be? Thank you

Doctor's answer:

Hello, to prevent penile erection congestion, you need to do the following:
Strengthen the learning and mastery of sexual knowledge. Learn more about normal sexual physiology and psychology to avoid unnecessary anxiety and psychological burdens caused by sexual ignorance, and prevent the occurrence of psychogenic ED.
Reduce life stress and maintain a cheerful mood. Adjust your diet, avoid smoking and drinking alcohol. Eat in moderation, do not overeat, and do not smoke.
You should: Eat in moderation, maintain a regular lifestyle.
Maintain regular sexual life and avoid excessive indulgence.