How many people out of 100 have an STD?

Sexual Health Simplify

Out of 100 sexually active people, around 25 of them will get an STD (or , which is the more accurate term) at some point in their lifetime. That's roughly 1 in 4.

The exact number is hard to pin down because a lot of people with STIs don't know they have one and haven't been tested. But STIs are more common than most people think.

In the UK, hundreds of thousands of new STI cases are diagnosed every year. is the most common, and about half of all diagnoses are in people under 25. Young people have the highest rates partly because they're more likely to have new sexual partners and less likely to use protection consistently.

The reason the numbers are so high is that most STIs have no symptoms. People pass them on without knowing they have them. That's why regular testing matters, not because STIs are something to panic about, but because catching them early makes them easy to deal with.

More people than you would think. About 1 in 4 sexually active people will get an at some point in their life.

In the UK, hundreds of thousands of new STI cases are found every year. is the most common, and about half of all cases are in people under 25.

The numbers are so high because most STIs have no symptoms. People pass them on without knowing.

STIs are not something to panic about. Most are easy to treat. But getting tested regularly is important because it is the only way to know if you have one.