Fever is a common symptom of many sexually transmitted diseases (STDs) and sexually transmitted infections (STIs). When the body is trying to fight an infection, it can cause a fever, which is a sign that something is wrong. HIV, chlamydia, gonorrhea, syphilis, hepatitis A, and herpes are all STDs that can cause a fever. In some cases, people may not experience any symptoms when they are first infected with HIV.
However, some people may develop flu-like symptoms two to six weeks after being infected. Nausea and vomiting are also common symptoms of the flu or food poisoning, but they can also be signs of STDs such as syphilis, hepatitis A, hepatitis C, and HIV. Other STDs such as pelvic inflammatory disease (PID) and cervical cancer can also cause symptoms such as nausea and vomiting. PID is caused by an untreated chlamydia or gonorrhea infection, while cervical cancer is caused by human papillomavirus (HPV).
If you're feeling unusually tired and you're sexually active, it's important to get tested for STDs and STIs. If you notice any of these symptoms or if your partner has been diagnosed with an STD or has symptoms, it's important to see your doctor or nurse right away. Your local Planned Parenthood health center can also provide testing and treatment for STDs.