Urethritis is inflammation of the urethra. The urethra is the tube that carries urine from the bladder out of the body.
Urethritis is usually caused by infection, although this is not always the case. The term non-specific urethritis (NSU) is used when the cause of the urethritis has not yet been identified, but it is known that Gonorrhoea, a sexually transmitted infection (STI), is not responsible.
NSU can have a number of possible causes, but it is estimated that the STI Chlamydia is responsible for nearly half of all male cases.
For full details of Urethritis click here to be taken to the NHS Choices website. If you are worried you may be at risk of having an STI or have any symptoms (as mentioned on the NHS Choices link to Urethritis), you should visit your local sexual health or GUM clinic to have them checked out.
(Link checked as correct on 26/04/2013 by SH next update due 26/10/2013)