Deposition of calcium salts is not a local process that is going in a particular organ, but a general one. There is a great variety of reasons: metabolic disease, harmful food, hereditary inclination and others.
A healthy human body is able to assimilate salts from food and water and to remove the remnants. But if the salt metabolism is broken, heavy salts begin to deposit in suitable for them places and cause different diseases, such as osteochndrosis and other joint diseases.
Purification with rice.
Pour 3 tablespoons of rice with 1 litre of water. In the morning pour off the water, add some fresh water and boil for 5 minutes. Repeat that 2 times. After 4 times eat the warm rice and don't eat anything after that for 3 hours. Then lead yur habitual ration. Adding dry fruit is obligatory. The course lasts 10 days.
You can make a cake of dried fruit: mince 300 g of dried apricots, raisins, prunes, add a half of a lemon and fill everything with honey. Keep this cake in the fridge and take 1 tablespoon of it in the second half of the day.