I know mine will swell and get puffy in my armpits if I do a lot of static arm holding positions {like reading a book } .

there is lymphatic drainage massage techniques
I use that when mine bother me.

http://deeptissue.com/articles/lymphatic_article.html
http://deeptissue.com/articles/lymph_technieque.html

oh and some video links - i didn't sort thru them just found the list-
http://video.google.com/videosearch?...NAGE+TECHNIQUE