Sexually transmitted diseases (STDs), also known as sexually transmitted infections (STIs), are illnesses that are spread through sexual contact. STDs can affect any gender, age, or sexual orientation, and they can be spread through vaginal, anal, or oral sex. Some of the most common STDs are chlamydia, gonorrhea, syphilis, HIV/AIDS, human papillomavirus (HPV), and hepatitis B. STDs can have a range of symptoms, including abnormal vaginal discharge, burning during urination, and genital sores. In some cases, however, a person may not experience any symptoms at all. If left untreated, STDs can cause serious health complications, including infertility, organ damage, and even death. The best way to reduce your risk of getting an STD is to practice safe sex. This means using condoms during sexual contact and getting tested regularly. It is also important to be open and honest with your partner about your sexual health and to ensure that both of you are up-to-date on all STD testing. Regular testing is an important part of protecting your sexual health.