Sexually Transmitted Infections

Half of all sexually active young people will get an STI by age 25. Most won't know it. 

Sexually transmitted infections (STIs) are infections you can get through sexual contact involving the mouth, penis, vagina or anus. Each year, there are more than 15 million new STD cases in the United States. STDs are more common that most people think. Young people are at particularly high risk.

Get Tested at UNH

Screening/Testing by Appointment

Make an appointment online or call 603-862-9355

Walk-In Screenings:

Get Yourself Tested (GYT) Walk-In STI/HIV Clinic for Students

Get Yourself Tested Month is held annually in April. Keep an eye on our events page for updated dates and times of our GYT clinic. 

If you are unable to attend the walk-in clinic, we offer testing every day we are open. You can make an appointment to get tested online or by calling (603) 862-9355.

About Screening/Testing

* We may need to get a urine sample for your testing. Please do not urinate within 3 hours of getting tested.

  •  STI services are confidential.
  • Pricing varies, depending on what STI testing our health care provider recommends based on your screening.
  • We can bill your insurance plan; reimbursement/coverage depends on your individual plan.
  • If you do not want us to bill your insurance, you can also pay by cash, personal check, Visa, MasterCard, Discover, or Cat's Cache.

STI Prevention

The only way to avoid STIs is to not have vaginal, anal, or oral sex.

If you are sexually active, you can do the following things to lower your chances of getting an STI:

  • Be in mutually monogamous relationship with a partner who has been tested and has negative STI test results
  • Use latex condoms the right way every time you have sex. Learn more about using condoms by clicking here.
  • Talk about the potential risk of STIs before you have sex with a new partner. That way you can make informed choices about the level of risk you are comfortable taking with your sexual health.
  • If you or someone you know has questions about safer sex or STIs, our clinicians and wellness educators/counselors are available by calling (603) 862-2856 or making an appointment online.


About STIs

Most people don’t know they have an STI because they have no symptoms or they may be embarrassed to talk with a health care provider. Most STIs are easily cured if they are caught early. If left untreated, some STIs can cause reproductive and health concerns. If you are sexually active, take care of your sexual health by getting tested regularly.


Caused by Bacteria

Cased by Infection




Chlamydia is the most commonly reported STI in the U.S. Over 1 million cases are reported each year. The highest proportion of cases is among women aged 15 to 24. 

  • Bacterial infection of the genitals, anus, or throat
  • Obtained through vaginal, oral, or anal sex 


  • Often there are no symptoms
  • Vaginal/genital discharge that is discolored or yellow-green, bleeding (not their period), and/or burning and pain during urination

Penis/genital discharge or pain during urination, and/or burning or itching around the opening of the penis/genitals


At least 50 million people are already infected with herpes, or about one in six people. An estimated 1 million new infections occur each year.

  • Viral infection of the genital areas, it can also infect the mouth and lips 
  • Obtained through vaginal, oral or anal sex or during skin-to-skin sexual contact 


  • Most people have no symptoms
  • Herpes 1 typically causes cold sores and fever blisters in or around the mouth
  • Herpes 2 typically causes genital sores or blisters
  • Both Herpes 1 and 2 can cause sores in either area
  • A herpes outbreak can start as red bumps and then turn into painful blisters or sores. During the first outbreak , it can also lead to flu-like symptoms (such as a fever, headaches, and swollen glands)


An estimated 700,000 people in the U.S. get gonorrhea each year. The highest rates are among women aged 15 to 24 and men aged 20 to 24.

  • Bacterial infection of the genitals, anus or throat
  • Obtained through vaginal, oral or anal sex


  • Most infected people have no symptoms
  • For those who do, gonorrhea can cause a burning sensation while urinating, abnormal white, green, and/or yellowish vaginal or penile discharge
  • Females may experience abnormal vaginal bleeding and/or pelvic pain
  • Males may experience painful or swollen testicles


More than 50% of sexually active people will get HPV at some point in their lives. An estimated 6 million new cases occur each year, with at least 20 million people already infected.

  • Viral infection with over 40 types that can infect the genitals, anus, or throat. Some types of HPV can cause warts and cancer.
  • Obtained through vaginal, oral, or anal sex or during skin-to-skin sexual contact


  • Most infected people have no symptoms
  • Some HPV types can cause genital warts - small bumps in and around the genitals (vagina, vulva, penis, testicals, and anus, etc.) If they do occur, warts may appear within weeks or months of having sex with an infected partner. 
  • Cancer-causing HPV types do not cause symptoms until the cancer is advanced. 

HPV Vaccine

  • Health & Wellness offers the HPV vaccine. Call (603) 862-2856 to learn more.


There are about 36,000 new cases of syphilis reported each year. 

  • Infection caused by bacteria that can spread throughout the body
  • Obtained through vaginal, oral or anal sex, kissing if there is a lesion (sore) on the mouth


  • Symptoms vary based on the course of infection—beginning with a single, painless sore (called a chancre) on the genitals, anus, or mouth. 
  • Other symptoms may appear up to 6 months after the first sore has disappeared, including a rash. However, there may be no noticeable symptoms until syphilis has progressed to more serious problems. 

Hepatitis B (HBV)

An estimated 38,000 people are infected with HBV each year (most of which are acquired through sex). Up to 1.4 million people are already infected with chronic HBV. Viral infection affecting the liver.

  • HBV can be acute, mild illness lasting for a short time or chronic, a serious life-long illness 
  • Obtained through vaginal, oral or anal sex; through childbirth if the baby does not get vaccinated against HBV; sharing contaminated needles or razors; exposure to the blood, bodily fluids (such as cum) or saliva of an infected person


  • Many people don't have symptoms, especially adults. 
  • People may experience tiredness, aches, nausea & vomiting, loss of appetite, darkening of urine, tenderness in the stomach, or yellowing of the skin and the whites of the eyes (called jaundice)

Hepatitis C (HCV)

An estimated 3.2 million persons are chronically infected with HCV in the United States. There are an estimated an estimated 17,000 new Hepatitis C virus infections each year.

  • Contagious liver disease that can range from mild illness to a serious, life-long condition
  • HCV is spread when infected blood enters the body of someone who is not infected. Today, most infections occur through sharing needles or other drug equipment. It can be transmitted sexually, but the risk is not high. Obtained through vaginal, oral, or anal sex or during skin-to-skin sexual contact.


  • Often there are no symptoms


About 50,000 new infections occur each year, with an estimated 1.2 million people already living with HIV.

  • Human immunodeficiency virus (HIV) weakens the immune system and eventually causes AIDS if left untreated
  • Obtained through vaginal, oral or anal sex, sharing contaminated needles and from mother-to-child during pregnancy or breast-feeding


  • Many people who are infected with HIV do not have any symptoms and feel healthy
  • Symptoms don’t usually develop until a person’s immune system has been weakened
  • Symptoms people experience are usually related to infections and cancers, due to a weakened immune system

Trichomoniasis aka Trich

There are an estimated 3.7 million people in the U.S. infected with Trich.

  • Parasite infection of the genitals 
  • Obtained through vaginal sex


  • Often there are no symptoms
  • Females may notice a frothy, smelly, yellowish-green vaginal discharge, and/or genital area discomfort
  • Males may temporarily have a discharge from the penis, slight burning after urination or ejaculation, and/or an irritation in the penis


Related Sexual Health Concerns 

Additional Resources