With cryo masks, rollers, and other frosty tools all the rage, cold therapy is touted as the ultimate beauty and wellness hack. Cryotherapy is blowing up on Instagram, with over 2 million views under #cryotherapy and similar hashtags, as beauty lovers and wellness junkies chill out to get that glow. Celebrities such as Jennifer Aniston and Lady Gaga are obsessed too. While Aniston added it to her go-to wellness hacks ...