Ask us anything. No judgments.

STD vs. STI


Someone asked us:

What is the difference between an STD and an STI?

STD and STI are two terms that often mean the same thing — but the “D” stands for “disease,” while the “I” stands for “infection.”. Medically, infections are only called diseases when they cause symptoms, and many STIs don’t have any symptoms. So that’s why you may hear people say STIs – it’s technically more accurate, and also reminds people that there are often no symptoms so it’s important to get tested.

But many people are more familiar with the terms “STD” and “sexually transmitted disease.” So it’s really common to hear people use these terms even when there are no signs of disease. And that’s why we tend to use STDs when we’re talking about them.

Learn more about STI/Ds.

- Alex at Planned Parenthood

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