Getting a fish pedicure is pretty safe but some people can break out with scars and boils and some have reported getting sick.
Getting a fish pedicure is where people dip their feet in a tub of water that is filled with small fish called Garra rufa and doing so can cause nontuberculous mycobacterial infections in some people.
So yes you can get sick from a fish pedicure but most times people never get sick and it's usually very safe even though it's not recommended by doctors.