Hello,
Thanks for posting your query at DoctorSpring. I can understand your concern.
It could be the beginning of herpes labialis.
From the picture, only the haemorrhage is seen, however it could be the beginning of herpes labialis.
The best treatment for it would be to take anti viral medication valacyclovir. Since it would require your doctor's prescription, I would recommend that you visit your doctor.
Hope this helps, Please let me know if I can address any other concerns for you.
Take care