Sexually transmitted infections (STIs) are infections or conditions that can develop after sexual activity involving the mouth, anus, vagina, or penis. STIs are caused by bacteria, viruses, or parasites. Some common STIs include:

• Chlamydia
• Genital herpes
• Gonorrhea
• HIV
• HPV
• Syphilis
• Trichomoniasis

Symptoms of STIs can include unusual discharge from the penis or vagina, sores or warts on the genital area, painful or frequent urination, itching and redness in the genital area, blisters or sores in or around the mouth, abnormal vaginal odor, anal itching, soreness, or bleeding, abdominal pain, and fever. However, some STIs are asymptomatic, meaning you may not have any symptoms. STIs are highly contagious, and you can have and pass on an STI without even knowing it. The most reliable way to avoid infection is to not have anal, vaginal, or oral sex. Correct usage of latex condoms greatly reduces, but does not completely eliminate, the risk of catching or spreading STIs. If you are sexually active, the Centers for Disease Control and Prevention (CDC) recommends regular STI screenings or testing. Antibiotics can treat STIs caused by bacteria or parasites, but there is no cure for STIs caused by viruses.