Your armpit node is a major drainage hub.It collects lymph from your arm, breast, upper back, and even part of your chest. If this node is backed up, fluid has nowhere to go—and that’s when you start noticing symptoms. What lymph congestion here can feel like. • Puffy or swollen upper arms• Tenderness or tightness in your armpit. • A heavy or achy feeling in your chest. • Fluid retention in your hand or arm. • Told you have dense breasts. • Even breast tenderness or skin dimpling. If you’ve ever