Is this erectile dysfunction?

Patient's question:

Patient Gender: Male
Medical History: A few weeks ago, an ultrasound revealed prostatitis, and the patient is currently undergoing treatment, which has lasted for more than two weeks.
Detailed Condition and Purpose of Consultation:
A few weeks ago, excessive masturbation led to the inability to achieve an erection. The patient felt a desire, but the genitalia did not respond. After resting for a period (half a month), sometimes the erection could be achieved, and it was quite firm, but after a single ejaculation, it returned to the previous state. The patient is unsure why this is happening and whether it is erectile dysfunction.
Follow-up Question: In recent weeks, during mornings or masturbation, the penis...

Doctor's answer:

Hello, many men cannot determine whether they suffer from erectile dysfunction, but in fact, the nature of erectile dysfunction can be judged from the nocturnal penile erection. Normal men of all ages can experience reflexive penile erections during sleep. During puberty, there are about 6 erections per night on average, each lasting 20-30 minutes; young and middle-aged adults have about 4 erections per night on average; healthy elderly people over 65 still have a total of 1-1.5 hours of erection time per night. Even children often have penile erections during sleep.
Clearly, nocturnal reflexive penile erections are unrelated to sexual stimulation and are not affected by psychological factors. Therefore, they can be used to distinguish whether erectile dysfunction is caused by psychological factors or by disease factors. If an erectile dysfunction patient has no nocturnal erections or the degree of erection is below the normal value for their age group, it may indicate the presence of disease factors, requiring further investigation to identify the root cause. If an erectile dysfunction patient has normal nocturnal erections, it is unlikely to be caused by disease factors but rather by psychological and mental factors. There are several methods for self-assessing nocturnal penile erections:
(1) Stamp Test: Use four stamps to surround the penis, stick the overlapping parts together to form a ring, and then go to sleep. In the morning, check whether the stamp has torn. If it has torn, it indicates nocturnal erections. If the overlapping part has come loose, it is not meaningful.
(2) Penile Circumference Measurement: There is a commercially available tape measure (usually paper-based) with one end connected to a square buckle. Before going to sleep, wrap it around the penis, and let one end come out through the buckle. First, record the baseline circumference of the penis in its flaccid state, then