By Harry Howard For Mailonline
Published: 13:12 BST, 1 June 2019 | Updated: 13:15 BST, 1 June 2019
A 35-year-old British man was left with a nine-day erection after falling off his moped and bruising his genitals.
The bruise to his perineum - the area between the genitals and anus - in the crash, nine days before his visit to a UK hospital, caused a constant flow of blood to his penis.
It meant that he was left with a Grade IV erection - the highest level on a medical scale known as the Erection Hardness Score - for nine continuous days.
A 35-year-old British man was left with a nine-day erection after falling off his moped and bruising his genitals (stock image)
The man's case was revealed in a case study published last month in the journal Case Reports in Urology.
The report described how, although the erection was not painful, the man did experience 'mild discomfort in walking'.
Doctors said: 'On examination there was a grade IV erection with a rigid base and shaft with slight dorsal curvature of 10 degrees, which was nontender.
'There was a superficial haematoma (bleeding) present to the scrotum and base of penis.'
Ninety five percent of cases of priapism - where an erection lasts too long - are caused when blood cannot leave the penis because of a blockage of blood vessels.
This is known as low-flow