Lymphangectasia is a chronic form of protein losing enteropathy so I'm not sure if that's what he meant? We have a dog at our clinic who suffers from it. It's relatively rare, and her main symptom is an inability to maintain a healthy weight.
Buddy has similar little bumps all over, more and more as she ages. They too break open and bleed and scab. Then we wait to see if they regrow. If so, we snip them out with a local. Here is one that I'm watching:
They are benign, just annoying.