Final answer:
Ere-ctile dysfunction (ED) is a medical condition characterized by a persistent and painful ere-ction. It is a disorder that affects the ability to obtain or maintain an ere-ction of the pe-nis. This condition can have various causes such as issues with blood flow or nervous control.
Step-by-step explanation:
Ere-ctile dysfunction (ED) is a medical term that describes a persistent and painful erec-tion. It is a disorder characterized by the regular and repeated inability of a sexu-ally mature male to obtain or maintain an erecti-on of the p-enis. This condition can be caused by disturbances in normal blood flow to the p-enis or problems with the nervous control of penile engorgement or arousal.