How do I catch it?
NSU has many causes- some are sexually transmitted, some are not. Up to 30% of men with NSU have chlamydia and so the sexual health clinic will give you chlamydia treatment if they find NSU, just in case.
Other less common sexually transmitted infection causes of NSU include trichomonas, herpes and mycoplasma. NSU can also be caused by other organisms which are not sexually transmitted, and some of these can be treated by the antibiotics. Friction (during sex or masturbation) and sensitivity to chemicals such as spermicide, soap or latex can also cause NSU.
NSU can have long term impacts on your health if it is left untreated. This includes a painful infection in the testicles.