As for what is fear biologically speaking, when a person experiences fear, certain areas in their brain such as the amygdala and the hypothalamus are immediately activated and appear to control the first physical response to fear.
Kidney Stones Overview. Kidney stones are small pebbles of salt and mineral in the urine. The most common symptom is severe pain. Most stones pass on their own, but medical procedures are used to remove some kidney stones.
Kidney Stones and Chronic Kidney Disease. Kidney stones are a formation of hardened minerals in the kidneys or urinary system. In most cases, kidney stones are formed because of a decrease in urine volume or increase in the minerals that form the stones in the urine.