What is the cause of pain at the base of the penis?

Patient's question:

Detailed medical condition and consultation purpose: To understand the root cause of symptoms
Duration and persistence of the current episode: Approximately one night
Current general condition: Mostly good
Medical history: About 3 years
Previous diagnoses, treatments, and outcomes: Untreated
Ancillary tests: None

Doctor's answer:

Hello: Excitement and congestion, caused by insufficient timely return.