Thanks for writing to us.
From the description it seems, you could be having a viral infection known as herpes labialis. Herpes labialis usually keeps on recurring at same site due to stress, fever, low immunity etc.
To treat the same use an antibiotic cream two times in a day like mupirocin
. Prior to onset of lesion, slight prodromal symptoms like itching, numbness
at site may occur. If at this stage acyclovir
cream is used it would prevent its development.
Hope this helped.