<human>: Hi, I m 17 years old, 5 3 and weigh 110 lbs. Lately I have been having bad knee pain for unknown reasons. While I stand in place for minutes are a time my hips and knees have pain if I try to walk. Also when i m walking from class to class maybe after 50 feet my knees start to hurt. Sometimes I do hear grinding but none recently.
<bot>: Hello, It is necessary performing some tests in order to investigate for a possible connective tissue disorder or a metabolic disorder. In this regard, I would recommend performing these blood lab tests:- Complete blood count, PCR, ESR for inflammation- vitamin D plasma levels for possible deficiency-Blood electrolytes- Fibrinogen plasma levels-ANA and ANNA tier antibodies-Rheumatoid factor plasma levels. You should discuss with your doctor on the above tests. Hope I have answered your query. Let me know if I can assist you further. 