ysco

If you had those for 4 years with no change, and especially considering your age, I'm pretty much convinced they are not a place for concern. It's not necessarily true that everyone has pea-sized nodes; well, most doctors will tell you that "in most completely healthy individuals" their nodes could hardly be felt and are pea-sized. I don't think that's entirely true. Some people definitely have naturally bigger nodes than others, I don't know if they were born like that or if their body have some kind of tendency to react this way to different factors during their lifetime. Sometimes, nodes which have enlarged due to infectious causes can presist for a while even after the infection has been resolved. That would be more significant in skinny people, as their nodes are normally more noticeable and easier to feel.

So, anyway, back to your case. Allergies can definitely cause nodes to enlarge and perhaps persist if you are continuously exposed to their stimulating agents. Not sure about asthma, but possibly as well.

After all, it can be helpful to see your family doc concerning your health issues. and in this opportunity, you can ask him or her about your nodes too, even if you know they are most likely normal. What do you need doctors for anyway, if not to treat health problems and ease your mind when needed?