The only problem I have when I've swallowed too many loads or even one big one is later on. It tends to give me bowel issues bouts of diarrhea. It usually just passes through though and doesn't cause any other lasting issues. If I know I'm going to be sucking many cocks, I'll let them cum in my mouth and then spit it out, at least the first few guys. If I know I'll be leaving soon, I'll try to swallow all the cum I can. I had a group session a couple years ago where five guys came into a glass and then I drank it. Four of them got horny and had me suck them off before they left! Love when that happens.
FYI...I need to update my signature below as I no longer write that blog. I have one on Tumblr but it's mostly photos.