Hi..
Can understand your concern..
As per your complain sudden occurrence of bumps on lower lip which are slightly painful can be due to
allergic reaction due to some insect bite or it can also be due to allergy caused by the old lip balm if it is old enough to cause allergy due to expired constituents..
As you have not taken any medication to reduce the allergy the presence of toxins in the region can cause recurrence and exaggeration of symptoms..
I would suggest you to take anti allergic medicine like allegra or benadryl to reduce the bumps as well as avoid recurrence of symptoms..
You can apply steroid based
ointments like
Hydrocortisone 1% on the lip for local action..
In case of pain you can take anti inflammatory painkillers like
Ibuprofen or advil.
Avoid scratching or touching the bumps.
In case the bumps does not resolve or there is increase in the symptoms
consult a dermatologist.
Hope your query is solved..
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Thanks and regards..
Dr.Honey Nandwani Arora.