Surgical steel is something of a mystery metal; there are roughly 450 different mixes that qualify as surgical steel. Pretty much all of them carry some content of nickel. Nickel is a known sensitizer (people become more sensitive through contact).
What makes or breaks the healing of a piercing is the aftercare. There are countless articles, blog posts, and websites out there that all claim to have the best tips and tricks to take care of your fresh piercing. Unfortunately, the vast majority of them rely on outdated procedures or fad-based ideas that aren't truly helpful.