How long does it take to pass a kidney stone?

By Hande Hospitals

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Kidney stones are solid masses that are formed when chemicals and minerals in the urine harden into a crystal. Usually, these chemicals and minerals such as uric acid and kidney stones are always present at low levels. 



How long does it take to pass a kidney stone? 

Kidney stones have no known cause, but health factors, family history, and lifestyle changes can increase the likelihood of developing them.  


Causes of kidney stones.


Symptoms of kidney stones 


– Severe or sudden pain in the back and side – Blood in your urine – Frequent urination – Pain while urinating – Foul-smelling or cloudy urine


 Stones which are smaller than 4mm can pass on their own by 80% with an average of 31 days Passing a kidney stone is difficult when the size of the kidney stone is 4-6mm.  For this, medication is must but around 60% of them pass naturally with an average of 45 days.

Duration taken for passing a kidney stone



The following are the stages to make you understand what to expect and how to overcome or minimize the pain while passing a kidney stone. 

Stages of passing a kidney stone


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The formation of kidney stones is usually a painless process. Most people will get to know that the stone is formed only when they detach from the inner wall of the kidney.   The symptoms can include severe pain, fever, chills, blood in the urine, on and off pains when the kidney spasms try to get rid of the stone from inside the kidney. 


Stage 1


When the stone has entered the ureter which is nothing but the tube that connects the kidneys to the bladder.  The ureters inside diameter can be between 2-3mm wide. 


Stage 2


After kidney stones enter the bladder there will not be much pain than before. You’ll feel extreme pressure instead of pain. Your body will want to expel the stone where you may feel to urinate every 5 minutes.    


Stage 3


When the kidney stone gets far when the urethra opens, you have to really push it so hard. Keep pushing hard until the stone shoots out into the toilet’s bowl.  There are four types of kidney stones such as calcium stones, cystine stones, struvite stones, and uric acid stones.  


Stage 4


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