My girlfriend has been experiencing nausea, chronic neck pain, stuffy nose (cannot breathe well after clearing) some pain when urinating (she has PCOS, fevers frequently on and off, and lately diarrhea. What kind of infection can be causing all of this?
Helots history of illness and symptoms are not an indication of any particular disease. With the help of these symptoms at least, it is very difficult to establish any diagnosis. As you mentioned that she is having PCs, fever off & on, frequent urination, stuffy nose and difficult to breath. Stuffy nose and breathing problems may be due to bronchoconstriction (either due to allergy or infection) . While PCs is another disease. Fever on & off may be due to infection either urine or upper respiratory infection. At this stage I recommend you please visit a physician and get his opinion as physical examination as well as clinical examination is important in this case. Good luck.