Sexually transmitted infections (STIs), also known as sexually transmitted diseases or venereal diseases, are illnesses that are commonly transmitted between humans through sexual contact. Some of the most common STIs include chlamydia, genital herpes, gonorrhea, HIV/AIDS, hepatitis B, syphilis, and trichomoniasis. Symptoms of STIs can include itching, sores, discharge, pain during urination or sex, and general symptoms like fever and weight loss. It is important to see a doctor if experiencing multiple symptoms, in order to get properly diagnosed and treated. STIs can be prevented by using protection like condoms during sex, knowing one's partner well before being sexually