Final answer:
The presence of refractory retention and bladder stones can cause varying symptoms and severity. Mild cases may have minimal symptoms, while more severe cases can cause colicky pain, hematuria, and possible nausea and vomiting.
Step-by-step explanation:
When it comes to the presence of refractory retention and bladder stones, the symptoms and severity can vary. Without any complications, the symptoms may be mild or even absent. With mild symptoms, the presence of bladder stones may cause discomfort but not significant obstruction. However, with the presence of refractory retention and bladder stones, the symptoms can be more severe and include colicky pain, hematuria, and possible nausea and vomiting.