Kidney stones are hard deposits that form inside the kidneys when minerals and salts in urine stick together. They are common, can be very painful, but are usually treatable.
Kidney stones, also called renal calculi, are solid masses made from substances normally found in urine, such as calcium, oxalate, or uric acid. When urine becomes too concentrated, often due to not drinking enough water, these substances can crystallize and form stones. Stones can vary in size, from as small as a grain of sand to as large as a golf ball.
Many small stones pass out of the body naturally without causing symptoms. However, larger stones may block the flow of urine, leading to severe pain in the back or side, nausea, vomiting, or blood in the urine. The pain often comes in waves and can be intense enough to require medical attention.
There are different types of kidney stones:
- Calcium stones (most common)
- Uric acid stones (linked to diet and certain medical conditions)
- Struvite stones (often related to infections)
- Cystine stones (rare, due to genetic causes)
Treatment depends on the size and type of stone. Small stones may pass with increased fluid intake and pain relief. Larger stones might need medical procedures such as shock wave lithotripsy (breaking stones into smaller pieces), ureteroscopy, or percutaneous nephrolithotomy for very large stones.
Prevention is important. Staying well hydrated is the best way to reduce risk. Dietary changes, such as limiting salt and moderating protein intake, may also help. People with recurrent stones may need further tests to identify underlying causes.
In summary, kidney stones are a common condition caused by crystallized minerals in urine. They can be painful but are manageable with proper treatment and prevention strategies.
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