18 doctors weighed in:
What happens to my penis if an erection lasts more than 4 hours?
18 doctors weighed in

David Miller
Family Medicine
13 doctors agree
In brief: Bad things
This is called priapism and is an emergency.
The biggest problem is that the blood in the penis can clot and otherwise restrict circulation to the organ. This can result in permanent damage and permanent erectile dysfunction. It can be caused by a variety of things and requires emergency treatment to prevent damage. http://my.clevelandclinic.org/disorders/priapism/hic_priapism.aspx.

In brief: Bad things
This is called priapism and is an emergency.
The biggest problem is that the blood in the penis can clot and otherwise restrict circulation to the organ. This can result in permanent damage and permanent erectile dysfunction. It can be caused by a variety of things and requires emergency treatment to prevent damage. http://my.clevelandclinic.org/disorders/priapism/hic_priapism.aspx.
David Miller
David Miller
Answer assisted by David Miller, Medical Student
Thank
6 doctors agree
In brief: Priapism
Priapism: erection lasting over 4 hrs.
Get to the emergency room stat! to minimize risk of permanent impotence and to figure out why this happened.

In brief: Priapism
Priapism: erection lasting over 4 hrs.
Get to the emergency room stat! to minimize risk of permanent impotence and to figure out why this happened.
Dr. Richard Levin
Dr. Richard Levin
Thank
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