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STI vs. STD: What You Need to Know About Sexual Health Terms

May 12, 2025

A provider goes over STD testing results with a patient.

When enjoying a scoop of your favorite flavor at The Wooden Spoon Co. in Farragut, you may have heard the terms STI and STD thrown around, perhaps even in casual conversation. While these terms are often used interchangeably, understanding the distinction between them is important when it comes to sexual health. Both refer to infections transmitted through sexual activity, but the difference between them can influence how we approach testing, prevention, and treatment.

At AFC Farragut, we believe it’s essential to educate our community on these terms and provide easy access to testing and treatment. In this blog, we’ll explore what STI and STD mean, how they differ, and how we can help you stay on top of your sexual health.

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What is the Difference Between STI and STD?

The short answer? Not much, at least not in a medical sense. Both STI (sexually transmitted infection) and STD (sexually transmitted disease) refer to infections that are primarily spread through sexual contact. These infections can be caused by bacteria, viruses, or parasites. Common examples include chlamydia, gonorrhea, herpes, human papillomavirus (HPV), and HIV.

The primary difference comes down to the terminology and its implications.

“STD” is the older term and is more commonly used in everyday conversations. It is what many people are familiar with from movies, TV shows, or even sex education classes. However, in medical circles, “STI” is the preferred term because it is more precise and carries less stigma.

Why Medical Professionals Prefer the Term “STI”

The reason medical professionals often favor the term “STI” is that it is more accurate and encompassing. An infection refers to the presence of harmful microorganisms like bacteria, viruses, or parasites in the body, which may or may not show symptoms. You could have an STI and not even know it. Many STIs, like chlamydia or HPV, may not cause noticeable symptoms, but they can still be transmitted to others and lead to health complications if left untreated.

On the other hand, “disease” refers to a more advanced stage of infection when symptoms or complications arise. For example, HPV may not cause symptoms, but if left untreated, it can lead to cervical cancer, which would be classified as a disease. Essentially, all STDs begin as STIs, but not all STIs progress to diseases.

Understanding this difference is important because it emphasizes the importance of early detection and regular testing, even in the absence of symptoms.

Why It Matters: Reducing Stigma and Encouraging Testing

The terminology we use impacts the way we talk about sexual health, and this can affect how comfortable people feel seeking testing and treatment. The word “infection” feels less intimidating and less stigmatizing than “disease.” As a result, people may feel more open to discussing STIs, getting tested, and seeking help without the fear of judgment.

Many STIs, such as chlamydia or HIV, can be present in the body without any symptoms. Because of this, testing is the only way to know for sure whether you have an STI. This is especially important for sexually active individuals, as early detection can prevent long-term health issues and reduce the spread of infections.

At AFC Farragut, we prioritize your comfort and confidentiality. We want to ensure that anyone who needs testing has access to it, without fear of judgment.

Common STIs You Should Be Aware Of

Here are a few of the most common STIs that impact sexual health in the United States:

  • Chlamydia: A bacterial infection that often goes unnoticed because it may not present any symptoms. If left untreated, it can lead to infertility, but it is easily treated with antibiotics.
  • Gonorrhea: Another bacterial infection that can affect the genitals, rectum, and throat. It can also lead to complications like infertility if left untreated.
  • HPV (Human Papillomavirus): The most common STI, some strains of which can cause genital warts and increase the risk of certain cancers. Vaccines are available to protect against the most harmful strains.
  • Herpes Simplex Virus (HSV): Known for causing oral and genital sores, herpes is highly contagious and can be transmitted even when symptoms are not visible.
  • Syphilis: A bacterial infection that progresses in stages. If untreated, it can cause severe health complications, but it is treatable with antibiotics.
  • HIV (Human Immunodeficiency Virus): This virus attacks the immune system and, if untreated, can progress to AIDS. While there is no cure, early diagnosis and treatment can manage HIV effectively.

How AFC Farragut Can Help

If you’re concerned about an STI or want peace of mind, our clinic is here to help. We offer confidential STI testing in a comfortable, professional setting, ensuring that your health remains a priority. Whether you’re experiencing symptoms, have been exposed to someone with an STI, or simply want a routine check-up, our walk-in clinic provides same-day testing, often with results available quickly.

Our compassionate team is committed to providing the care you need, whether that involves testing, treatment, or educational resources. If your test results come back positive, we will guide you through your treatment options and offer support for both you and your sexual partners.

Final Thoughts

The terms “STI” and “STD” may seem interchangeable, but understanding their subtle difference can help reduce stigma and encourage more people to take proactive steps toward maintaining their sexual health. Regardless of the terminology, the most important thing is to prioritize regular testing, practice safe sexual habits, and seek treatment when necessary.

If you’re sexually active or have concerns about potential exposure, don’t wait to get tested. AFC Farragut is here to provide confidential, convenient, and compassionate care, so you can stay in control of your sexual health. Visit us today and take the first step toward peace of mind and a healthy future.

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