Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
Swollen upper lip can be due to many reasons
1.Swollen lips are a common symptom of an
allergic reaction. Contact with any allergen like pet dander, certain foods can cause it.
2.Swollen lips are a common symptom of angioedema(severe
anaphylactic reaction). triggers of angiodema are certain foods, pollen, medicines,
insect bites,etc
Patients will have swollen eyes also. It is a medical emergency.
3.Swollen upper lip may be symptom of a
dental abscess.
4. Other causes are cold sore caused by
herpes simplex virus, fluid retention in body, nutritional deficency , etc
5. Due to trauma
Treatment depends on cause, Antihistamines like cetrizine & Anti-inflammatory medicines can be tried
Best way is to visit a doctor/oral physician, he would make a diagnosis and treat according to it.
Don't worry you would be fine
Hoping your query is solved.