Welcome to health care magic forum.
Thanks for writing to us.
From the details mentioned,its not clear that what type of surgery have you undergone.
Runny nose can be due to allergic rhinitis
Usually,Cetirizine is administered in such cases.
The cause of swelling palate has to be evaluated and drain the absces.
Associated tooth ,if decayed has to be extracted or root canal treated.
If there is periodontal infection
,deep scaling as well as curettage has to be done.
Meanwhile,maintain oral hygiene
To prevent underlying infection,Amoxycillin
has to be administered.
Hope this helps.