I don’t want to get an allergic reaction and get an infection. I heard that if you just wear pure metals then you get allergic to other metals for earrings.
i know that lots of people can only wear a particular pure metal (like gold) or their ears turn green or something lol 
but i have never heard that wearing only one type will make you allergic to others…anyway, sergical steel or stainless steal is meant to be fine for piercings because its sterile.
the only metals you have to watch out for are the tacky ones that have just been COATED in silver or paint.
dont stress, just wear what you listed about and steer clear of any cheap rip offs and you should be fine 
i know that lots of people can only wear a particular pure metal (like gold) or their ears turn green or something lol
but i have never heard that wearing only one type will make you allergic to others…anyway, sergical steel or stainless steal is meant to be fine for piercings because its sterile.
the only metals you have to watch out for are the tacky ones that have just been COATED in silver or paint.
dont stress, just wear what you listed about and steer clear of any cheap rip offs and you should be fine
References :
I have reactions to everything except surgical nickle free steel and rhodium plated ear wires –and that includes gold, silver, everything. I even replace the wires on expensive jewels with nickle free steel or rhodium plated wires, or I end up with sore red ears.
References :