My urine test shows calcium oxalate(+). do i have kidney stone? what diet to follow and what to avoid? is it serious?

Kidney stones: Symptoms that may suggest kidney stones are : pain one side of the belly, nausea, wanting to urinate frequently, pain in lower part of belly, blood in urine etc. Do you have any symptoms? Just presence of oxalate in urine might mean that your diet is high in oxalate. Visit this page to know about oxalate content in food. https://regepi.bwh.harvard.edu/health/nutrition.html