The number of men suffering from painful testicular problems is on the rise - thanks to the current fashion for tight jeans, experts have claimed.
Medical experts, including Dr Hilary Jones, have reported an increase in injuries being caused by the jeans, which are favoured by celebs such as Russell Brand, Jude Law and Joey Essex.
The trendy denims are causing twisted testicles, bladder weakness and even urinary tract infections.
Low sperm count and fungal infections are also being put down to the tight-fitting jeans.
Yesterday Dr Jones, who is working with TENA on a project to highlight the dangers, said: ''I have seen several cases of men who have twisted their testicles due to wearing jeans that are far too tight.
''My advice would be to make sure you leave plenty of room around the groin area and that your pants and trousers feel comfortable so you're not being restricted in any way.
''Men who wear tight or ill-fitting trousers, or underwear which is restrictive around the groin area could be damaging their health.
''Wearing tight-fitting clothing over a prolonged period of time can lead to urinary tract infections leading to over-activity of the bladder - a type of bladder weakness as well as a low sperm count and fungal infections.
''Please don't put style before health.''