Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain swollen
upper lip seems most probably due to Allergic
Angioedema of the lip and can be caused due to
allergic reaction to any of the ingredient of the pancake or any other food that you have taken along with it..
There might be any harmful ingredient like any expired or unwanted ingredient added in it can also be a cause..
It you have eaten it extremely hot then it can cause sudden thermal trauma to the delicate mucosa and can cause slight swelling..
The reaction seems mild so need not to worry.
You can apply numbing gel at the burning area, do cool compresses and avoid hot and spicy food..
You can also take an anti allergic like levocetrizine for reducing swelling..
Hope this information helps..
Thanks and regards.
Dr. Honey Nandwani Arora.