Hello.
Thank you for asking at HCM.
I went through your son's history.
I would like to ask an important question to you - does he have persistent swollen
upper lip since last October or he gets
swollen lip which becomes normal with medications and again swells up?
If his lip becomes normal within 2-3 days of treatment and then again swells up, I would think he has "angioedema", which may be due to
allergy or sometimes even without allergy.
If his lip is persistently swollen since last October, I would not think of allergy. I would suggest you to consult a pediatric surgeon, who will examine it and may diagnose what type of swelling it is.
I would also suggest you to check his teeth and gums on the right side. A dental or gingival disease can also cause
lip swelling. A dental consultation then will be necessary.
Hope above answer will be helpful to you.
Wish your son the best of the health.
Should you have any further query, please feel free to ask at HCM.
Thank you & Regards.