Sexually transmitted infections often occur when having unprotected sex.
There are many kinds of STIs, including chlamydia and genital herpes which all come with different symptoms.
Some diseases can go unnoticed as the NHS advises Brits to get a check-up if they’re concerned.
Now ahead of World Sexual Health Day on September 4, the World Health Organisation warned cases of drug-resistant gonorrhoea are on the rise.
The WHO also considers Neisseria gonorrhoea, also known as super gonorrhoea, a “priority microorganism” to be monitored for antimicrobial resistance.
New guidance on STIs requires countries to work towards improving access for better testing and diagnostic services.