Kidney stone pain is a pain called “renal colic” in medicine, which usually starts suddenly and is very severe. It occurs as the stone moves from the kidney toward the urinary channel (ureter), and when it partially or completely blocks urine flow the pain becomes even more pronounced. This pain does not remain limited to a single area of the body; it can spread to different areas depending on where the stone is located.
Kidney stone pain is often described by patients as “one of the hardest pains to endure” and comes in waves.
Where Does Kidney Stone Pain Most Commonly Radiate To?
Kidney stone pain typically spreads to the following areas:
Flank and Lower Back Area
The pain usually starts first on the right or left flank, between the area below the ribs and the lower back. This area is where the kidney is anatomically located. The pain is often one-sided.
Lower Abdomen
As the stone advances toward the urinary channel, the pain can spread to the lower abdomen. During this period the pain tends to shift further downward.
Groin Area
One of the most characteristic areas of spread of kidney stone pain is the groin area. As the stone descends to the lower part of the urinary channel, the pain moves down toward the groin and is felt more sharply there.
Genital Area
In men the pain can radiate to the testicles, and in women to the labia (the genital area). This is seen more frequently especially when the stone is in the lower ureter segment near the bladder.
Spread Between the Back and Abdomen
In some patients the pain can start in the back and show a “wandering” character toward the abdomen. This spread is a typical feature of kidney stone pain.
What Are the Features of Kidney Stone Pain?
There are some typical features that distinguish kidney stone pain from other pains:
- It starts suddenly and is very severe
- It can increase and decrease in waves
- It tends to shift (flank → abdomen → groin)
- The patient cannot keep still and constantly feels the need to change position
- It is frequently accompanied by nausea and vomiting
These features are quite important in distinguishing kidney stone pain from other abdominal pains.
Why Is the Pain So Severe?
When a kidney stone causes a blockage in the urinary channel, the pressure inside the kidney increases. This pressure causes the kidney to enlarge and the nerve endings to be stimulated. In addition, the contractions of the ureter muscles as they try to push the stone also increase the severity of the pain.
In Which Situations Is the Pain Felt More?
Kidney stone pain can be more severe in the following situations:
- The stone completely blocking the urinary channel
- The stone being in motion
- The presence of an accompanying infection
- The complete blockage of urine flow
Which Symptoms Accompany Kidney Stone Pain?
The pain is usually accompanied by the following symptoms as well:
- Blood in the urine
- Frequent urination
- Burning when urinating
- Nausea and vomiting
- Sweating and restlessness
- Inability to urinate (in complete blockage)
When Is It an Emergency?
Urgent medical intervention is required in the following situations:
- Severe and persistent pain
- Fever and chills (a sign of infection)
- Inability to urinate
- The presence of a single kidney
- Inability to control nausea and vomiting
These situations can threaten kidney function and require rapid intervention.
Summary
Kidney stone pain is a severe pain that usually starts in the flank and lower back area and spreads toward the lower abdomen, the groin and the genital area. The most typical feature is that the pain shifts and comes in waves. When such pain is seen, an evaluation must definitely be made in terms of an underlying kidney stone disease, and rapid treatment should be planned if necessary. Thanks to early intervention, the pain is brought under control and kidney damage can be prevented.
