Kidney stones are hard deposits made of minerals and salts that form inside your kidneys. Diet, excess body weight, some medical conditions, and certain supplements and medications are among the many causes of kidney stones.

Causes:

Possible causes include drinking too little water, exercise, rotundity, weight loss surgery, or eating food with too important sugar. Infections and family history might be important in some people. Eating too important fructose correlates with adding threat of developing a order gravestone. Fructose can be plant in table sugar and high fructose sludge saccharinity.

Types of kidney stones:

• Calcium oxalate: The most common type of kidney stone which is created when calcium combines with oxalate in the urine.
• Uric acid: This is another common type of kidney stone. Foods such as organ meats and shellfish have high concentrations of a natural chemical compound known as purines.
• Struvite: These stones are less common and are caused by infections in the upper urinary tract.
• Cystine: These stones are rare and tend to run in families.

Symptoms:

• severe pain on either side of your lower back.
• more vague pain or stomach ache that doesn’t go away.
• blood in the urine
• nausea or vomiting
• fever and chills
• urine that smells bad or looks cloudy

soource from https://www.kidney.org/atoz/content/kidneystones