Diagnosing the cause of these symptoms usually involves a combination of medical history, physical examination, and diagnostic testing. Blood tests can reveal markers of infection or inflammation, while imaging studies like chest X-rays or CT scans can identify abnormalities in the lungs or other organs. Stool samples can help identify parasites or bacteria responsible for chronic diarrhea. A biopsy of swollen lymph nodes may be necessary to rule out malignancies or specific infections.
