4. Fatigue
Fatigue is a very generalized symptom that can point to many different conditions, including certain STDs. Infections like Hepatitis and HIV can cause fatigue, particularly in their early stages. Hepatitis is a potentially serious infection that can inflame the liver and cause permanent liver damage. HIV is another serious infection that slowly destroys the immune system. Fortunately, new medications can effectively slow down the progression of HIV. However, prompt diagnosis and treatment are vital.