STDs, also known as sexually transmitted infections (STIs), are typically caused by bacteria or viruses and are passed from person to person during sexual contact with the penis, vagina, anus, or mouth. The symptoms of STDs/STIs vary between individuals, depending on the cause, and many people may not experience symptoms at all.
How do health care providers diagnose a sexually transmitted disease (STD) or sexually transmitted infection (STI)? Any person who is sexually active should discuss his or her risk factors for STDs/STIs with a health care provider and ask about getting tested.
People with STDs/STIs may feel ill and notice some of the following signs and symptoms: 1, 2 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 Fever In some cases, people with STIs ...
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Links to websites of groups that study or provide information about sexually transmitted diseases (STDs)/sexually transmitted infections (STIs).
STDs/STIs caused by bacteria or parasites can be treated with antibiotics. These antibiotics are most often given by mouth (orally). However, sometimes they are injected or applied directly to the affected area.
Men can take measures to avoid STDs by knowing a partner's STD and health history, speaking with a healthcare provider about risks and testing, practicing safe sex, and getting appropriate vaccines.