A patch test isn't just a boring medical check; it's the professional boundary that separates elite lash legends from the amateurs. You're building an empire, and one bad reaction can torch your reputation and your bank …
It is 10 PM on a Tuesday and your phone buzzes with a photo that makes your heart stop. Your favorite client has swollen, red, itchy eyelids that look like she went ten rounds in a boxing ring. We have all been there, la…