hi...thanks for your query.
There is a chance of reinfection happening on the same site or another form of lesion happening on the same site.It is difficult to comment on what other lesion might occur without inspecting.However the site and the sensation you mention, you can have a herpes simplex
infection on your lips.
For now, you can apply a topical Mupirocin
cream on the lesion twice daily for 5 days and consult a dermatologist
to find out the definitive cure.
Hope this helps..Take care!