Foods containing high oxalic acid include beans, grapes, parsley, spinach, strawberries, leeks and bamboo shoots. The oxalic acid contained in these foods is relatively high, so it is best to scald them with water before eating, so as to remove the oxalic acid inside. Eating too much oxalic acid can easily lead to stones, so try to eat less food with more calcium oxalate. Once stones appear, it is necessary to actively treat them. Stones are also divided into severity. If they are minor stones, they can be treated in a conservative way. Under the guidance of a doctor, they should be treated with drugs to remove stones. If they are relatively large stones, taking medicine is ineffective and requires surgery. No matter what kind of treatment, you should drink plenty of water and do some outdoor exercise, which can effectively help the stones to be excreted. There are many factors that lead to stones, so pay attention to them in many aspects.