Chlamydia and gonorrhea can cause a variety of symptoms, including no symptoms. In the review section, after each symptom is discussed in detail, the summary is presented in logo format. The drop and lightning bolt signify pain and discharge, which can occur in the genital or anal areas. Lower abdominal pain, throat infection and joint involvement are also depicted. Similar logo symptom summaries are presented for the other STDs, including HIV/AIDS (not shown here).