Kidney stones pass when urine flow carries them from the kidney, down the ureter, into the bladder, and out through the urethra. Most stones that are small enough to pass do so within a few days to a few weeks, and the process usually moves through three recognizable stages: the stone leaving the kidney, traveling down the ureter, and exiting the bladder. The ureter is the narrowest part of the journey, and it is where most of the pain happens.
How Do Men Pass Kidney Stones Stages And Tips?
The passage of a stone follows the anatomy of the urinary tract, and each stage produces its own set of sensations. Knowing what to expect at each point helps men recognize whether things are progressing normally or whether something needs medical attention.
The first stage is the stone breaking loose from the kidney and entering the upper ureter. This often causes a dull ache in the flank or lower back that can come and go. The second stage is the stone moving down the ureter itself. The ureter is a muscular tube roughly the width of a thin spaghetti strand, and it actively squeezes urine downward in waves called peristalsis. When a stone gets lodged or scraped against the ureter wall, the muscle spasms, and that spasm is what produces the classic waves of severe pain known as renal colic.
The third stage is the stone reaching the bladder and passing through the urethra. Once a stone drops into the bladder, pain often eases noticeably. From there it exits during urination, sometimes with a sharp sting or a brief burning sensation. A man may or may not see the stone leave. Catching it matters, because a urologist can analyze its composition and guide prevention.
Timelines vary widely. Stones under about 5 millimeters pass on their own in the large majority of cases. Stones between 5 and 10 millimeters are less predictable and may take weeks or require intervention. Stones larger than 10 millimeters usually do not pass without a procedure. These size thresholds are well established in urology, though any individual case can behave differently.
Why Does Passing a Stone Hurt So Much?
The pain of a kidney stone is not caused by the stone cutting tissue. It is caused by obstruction and muscle spasm. When a stone blocks the flow of urine, pressure builds up behind it in the kidney and ureter. That back-pressure stretches the walls of the urinary tract, and the ureter responds with forceful contractions trying to push the stone along.
This is why the pain comes in waves rather than staying constant. Each peristaltic squeeze produces a spike of discomfort. Many men describe it as the worst pain they have ever felt, often compared to childbirth. The pain typically starts in the flank or back and can radiate downward toward the groin as the stone moves lower.
Nausea and vomiting are common during these episodes. That is not a stomach problem. The nerves that supply the kidney and ureter share pathways with the gut, so severe urinary pain frequently triggers nausea. This shared nerve pathway is a detail many people find surprising, but it explains why a kidney stone can make a man feel like he has food poisoning.
What Are the Signs a Stone Is About to Pass?
As a stone moves closer to the bladder, the location of pain shifts. Pain that started in the back often migrates to the lower abdomen, groin, or testicles. This downward migration is one of the most reliable signs that the stone is progressing.
Other signs include:
- A sudden urge to urinate frequently, as the stone irritates the bladder
- Burning or stinging during urination when the stone reaches the urethra
- A brief feeling of relief followed by a sharp sensation as the stone exits
- Visible blood in the urine, which can be pink, red, or brown
Blood in the urine is common with stones because the rough surface irritates the lining of the urinary tract. It is not always a sign of something dangerous, but it should be evaluated. Fever, chills, or inability to urinate are different. Those are warning signs that require urgent medical care, because they can indicate infection or complete blockage.
How Long Does It Take to Pass a Kidney Stone?
Most stones that are going to pass do so within a few days to a few weeks. The single biggest factor is size. Location matters too. A stone already in the lower ureter near the bladder is much closer to passing than one still in the kidney.
Doctors often use a period of observation for smaller stones before recommending a procedure. During that time, the goal is to manage pain and watch for complications. If a stone has not moved after a reasonable window, or if pain cannot be controlled, or if the kidney is becoming blocked, a urologist will typically recommend intervention.
There is no reliable way to force a stone to pass faster. Some clinicians recommend increased fluid intake and activity, and some prescribe a medication that relaxes the ureter to help stones move. The evidence for these approaches is mixed, and results vary from person to person. It is reasonable to discuss them with a doctor rather than assuming they will work.
Tips for Managing Pain and Flow at Home
Pain control is the main priority while waiting for a stone to pass. Nonsteroidal anti-inflammatory drugs are commonly used and are often more effective for stone pain than opioids, though anyone with kidney disease, ulcers, or on blood thinners should not take them without medical advice.
Drinking enough water to produce pale yellow urine is generally recommended. This helps maintain flow and may help move a stone along, though it will not dissolve one that is already formed. Straining urine is worth doing, because catching the stone allows a lab to identify what it is made of.
Heat applied to the back or abdomen can ease muscle spasm. Many men find a heating pad or warm bath helps during pain waves. Rest during severe episodes is reasonable, and light activity between episodes is generally fine.
When Should a Man See a Doctor Right Away?
Some situations are emergencies. A stone that blocks urine flow completely, or that is accompanied by infection, can damage the kidney if not treated quickly. Fever, chills, severe nausea that prevents keeping fluids down, or pain that cannot be controlled all warrant immediate care.
Other reasons to seek urgent evaluation include:
- No urine output for many hours
- Severe pain on only one side that is unrelenting
- Confusion, rapid heartbeat, or feeling very unwell
- A known single kidney or reduced kidney function
Men with a history of stones often know their own pattern. Even so, any new episode with fever or inability to urinate should not be managed at home. That combination can signal an infected, obstructed kidney, which is a medical emergency.
Can Kidney Stones Be Prevented From Coming Back?
Prevention depends on what the stone is made of. The most common type is calcium oxalate, and for that type, the single most effective step is drinking enough water. Higher urine volume means minerals are more diluted and less likely to crystallize.
Dietary changes can help. Reducing sodium intake lowers calcium in the urine. Getting calcium from food rather than supplements appears to reduce stone risk rather than increase it, which surprises many people. Oxalate-rich foods like spinach, rhubarb, and nuts matter more for some men than others, and restricting them is not universally recommended.
Anyone who has had more than one stone may benefit from a metabolic evaluation. A urologist or nephrologist can test urine and blood to find the specific cause, then tailor prevention. General advice helps, but personalized guidance based on stone composition is more effective.
Frequently Asked Questions
How do men pass kidney stones stage by stage?
The stone leaves the kidney, travels down the ureter in squeezing waves, then drops into the bladder and exits through the urethra. Most pain happens during the ureter stage because that tube is the narrowest part of the path.
What size kidney stone can a man pass on his own?
Stones under about 5 millimeters pass on their own in most cases, while stones over 10 millimeters usually need a procedure. Stones between 5 and 10 millimeters are less predictable and may take weeks.
How long does it take for a man to pass a kidney stone?
Most stones that pass do so within a few days to a few weeks, with size and location being the main factors. If a stone has not moved after a reasonable period, a doctor may recommend intervention.
When is a kidney stone an emergency?
Fever, chills, no urine output, or pain that cannot be controlled are emergency signs and need immediate care. These can indicate infection or complete blockage, which can damage the kidney if untreated.
