Some kidney stones pass on their own when they are small before causing any symptoms. Larger stones block urine flow and cause painful symptoms such as:

• Pain in the abdomen or lower back, which is intermittent and severe radiating to groin, and testis in males is the most striking feature
• Pain worsens during movement
• Blood in urine
• Pus in urine
• Fever
• Difficulty in urination, feeling of urgency, frequent, painful, burning urination
• Nausea, vomiting, chills and fever are seen in case of infection
• Urinary retention

Common symptoms and their severity as reported by people on Patientslikeme.

Possible complications are not just from the stones themselves but often due to the treatment procedures.

• Recurrence - the most common complication is that the kidney stones can occur again.
• Obstruction and infection - Blockage of the urinary tract can cause kidney damage and also can make the urinary tract susceptible to infection.