Welcome and thanks for posting your query to HCM.
The very first thing to tell you is do not become panicky about the problem it is not at all herpes
), as herpes infections are symptomatic with burning itching and pain sensation having multiple small blister
appearing and bursting within 24-48 hours to leave raw area. It never manifest as single painless bump. Now the thing what it could be: it appears to be simple swelling due to injury
on lip during kissing or self from own teeth also. This is also supported by the fact that the swelling is bit reduced in two days of time. Do not try to squeeze, pinch or try to burst the area as it may lead to further swelling or infection. If the swelling is increasing in size or becoming painful or multiple of other swellings are appearing then can contact us or consult a dermatologist
With best health wishes,
Dr Sanjay K Kanodia
MD ( Dermatology and STD/ Venereology)