What Causes Facial Swelling?
May be antio-neurotic edema as per the history you have provided.
Detailed Answer:
Hi.
Thanks for your query and an elucidate history.
Read your history and understood your concern.
The symptom complex you have put-in so well make me think of an allergic phenomenon and most probably manifesting as angio-neurotic edema with resultant all the symptoms that you have.
I do agree with you about this being not migraines.
Superior vena cava syndrome may not present this way.
You are already taking Topamax and Prednisolone, I do not know how Topamax is going to help you.
Prednisolone helps and if you have to take this for more than a few weeks, it is better to take additional Calcium and Vitamin D3.
Addition of Antihistamine may help.
I hope this answer helps you, please feel free to ask for further relevant queries if you need to or if you feel that there is a gap of communication.