Sexually Transmitted Diseases (STDs), also known as Sexually Transmitted Infections (STIs), are infections primarily spread through sexual contact, including vaginal, anal, and oral sex. Some STDs can also be transmitted through blood, shared needles, or from mother to child during childbirth. Early diagnosis and treatment are crucial to prevent serious health complications. Many STDs may not show symptoms in the early stages, leading to delayed diagnosis and unintentional transmission.