On TikTok, users tout the benefits of wearing compression socks while flying and urge others to wear them on long-haul flights, too. Compression socks can help reduce swelling and the risk of developing blood clots. The socks pose little health risks and can be useful to wear on long flights regardless of age, experts said. Preparation is essential if you want to stay comfortable on a long-haul flight, and many TikTokers recommend adding one thing in particular to your preflight to-do list:...