The two most common metal allergies are to nickel and copper, which are found in most jewelry parts.
Metal allergy symptoms include redness, itching, full out rash and skin flaking. This reaction generally occurs only where the metal contacts the skin, and fades when the irritation is removed.
LisM stainless steel jewelry parts are high quaility sergical steel 316L, and can be worn by those with copper allergy.
For those with nickel allergy I recommend using LisM silver jewelry which are high quality 925S or pure silver, or using copper jewelry.
For those allergic to both nickel and copper I recommend using titanium jewelry.
Read more about metal allergies at BrillianceFound.