STDs are infections that are transmitted from one person to another by vaginal, anal, or oral intercourse. They're extremely prevalent, and many people with them have no symptoms. STDs can cause major health concerns if left untreated. Sexual intercourse has been linked to the transmission of more than 30 germs, viruses, and parasites. Sexual contact, including vaginal, anal, and oral sex, is the most common way for STIs to spread. During pregnancy, childbirth, and breastfeeding, several STIs can be passed from mother to kid. A person can have a STI without displaying any signs or symptoms of illness. Vaginal discharge, urethral discharge or burning in males, genital ulcers, and abdominal pain are all common STI symptoms. Sexually transmitted infections (STIs) have a significant influence on sexual and reproductive health around the world. Every day, almost 1 million STIs are acquired. In high-income countries, accurate STI diagnostic tests are frequently used. These are particularly beneficial for detecting asymptomatic infections. Diagnostic tests, on the other hand, are scarce in low- and middle-income nations.