A kidney stone is a solid pebble like hard object that is made from chemicals in the urine, that can form in one or both of your kidney, after formation, the stone may stay in the kidney or travel down the urinary tract into the ureter. If it is Very small kidney stone that moves easily through your urinary tract, you may not have any symptoms, and may never know that you had a kidney stone.

Causes: A high concentration of minerals like calcium, oxalate, and uric acid  that come together to make crystals, all the crystals combine  together make one or more stones.

Symptoms:
• Severe pain on either side of your lower back
• More vague pain 
• Blood in the urine
• Nausea or vomiting
• Fever and chills
• Urine that smells bad or looks cloudy
• Pain while urinating