Stephanie notes that STDs can lead to additional illnesses, especially in women. Chlamydia or gonorrhea if left untreated can cause other conditions such as Pelvic Inflammatory Disease (PID), which can lead to infertility. An HPV infection can lead to genital warts, while HPV and Hepatitis B infections can both lead to cervical cancer or liver cancer. And HIV can progress to AIDS (acquired immunodeficiency syndrome). So proactive medical care by an infectious disease expert and other allied medical specialists is key to avoid progression of the disease.