Causes, incidence, and risk factors
Kidney <span style = 'background-color: #dae8f4'>stone</span>s
are common. Some types run in
families. They often occur in
There are different types of kidney stone
s. The exact cause depends on the type of stone
s can form when urine contains too much of certain substances. These substances can create small crystals that become stone
s. The stone
s take weeks or months to form.
s are most common. They are more common in men between age 20-30.