Various nervous diseases can harm your nervous system. One of the major of them is Huntington's.
no se
It's said not to harm anything.
no they help the digestive system.
No.
the injuries may harm the bones is the cramps
what injuries can harm skeletal and muscular system
because it will harm your urinary system
what injuries can harm the skeletal and muscular system
no
Some people are allergic and if in contact with the skin, could cause a rash.
It helps it gain immunity