It turns out that this dude doesn’t just go to the gym a lot. Damn that was a shitty joke. This is called “Lymphedema” – it’s a condition of localized fluid retention and tissue swelling caused by a compromised lymphatic system. The lymphatic system returns the interstitial fluid to the thoracic duct and then to the bloodstream, where it is recirculated back to the tissues. Tissues with lymphedema are at risk of infection.Â If that last part sounded really smart it’s because I copy/pasted it from Wikipedia.