After I started lifting weights, I noticed the arm in which my lymph nodes were removed was much larger than the other. Should I be concerned?

It's one of those things that you're going to have to get a test to just to see what's happening. Anytime you do surgery to remove, especially like the lymphatic system, now we have less lymphatic system.

What is the lymphatic system? It's like the backup to your circulation. And so at the very end of your capillaries, all this blood flow goes through into your lymph system and it can act as a reservoir. So apparently maybe you're getting a bit of a backup of lymph in that arm in which case it doesn't have a pump. So you're just going to have to maintain consistent exercise to keep the keep things flowing through that area.