A new condition that causes severe and prolonged erectile difficulties, but can be treated with a pill or other method, has been identified in the United States.
A new condition known as berine erective dysfunction (BED) has been diagnosed in more than 200,000 people worldwide and is linked to the use of opioids.
A study of more than 6,500 men in the US found that the prevalence of BED among men in their 20s and 30s is nearly double the rate of men of any other age, with a greater proportion of men reporting problems in the early years of the condition.
In the United Kingdom, a similar study found a similar trend.
The US study found that women were more likely to be diagnosed with BED than men.
The study was carried out by researchers at Boston University and the Mayo Clinic in Rochester, Minnesota.
It was published online on Thursday in the journal Archives of Sexual Behavior.
Researchers analysed data from the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), which is used by medical professionals to diagnose erectile disorders.
The study found the prevalence among men between 20 and 29 was 10% higher than that of women between 20 to 29.
They also found that people who reported frequent and severe symptoms of BEV were more than twice as likely to have symptoms of EDD (erectilia-dysfunctioning disorder) and erectile-dilation dysfunction (EDD-D) than those who reported fewer symptoms.
There were a number of factors that may have contributed to the greater prevalence of people with BEV, including increased exposure to prescription opioids, higher rates of substance abuse and higher rates in certain geographic areas.
The report also found the use and abuse of prescription opioids was significantly higher in women.
Researchers also noted that many men and women with BEE did not receive the same kind of treatment, and some of those who did did not seek treatment.
The cause of BEE was not clear, but the researchers noted that it could be due to a combination of factors including hormonal changes, which may also play a role.