If you've been setting aside money in an HSA or FSA all year, Black Friday is one of the smartest times to spend it. Not only is the clock ticking on many FSA accounts (which expire at the end of the year), but we're seeing major savings on genuinely useful health and wellness products from brands that accept HSA/FSA payment. That means you can use your pre-tax dollars to score deals on everything from smart rings to acne-fighting skincare.You can generally use your HSA/FSA on anything considered medically ...