Can oral herpes to get worse?

Yes and No: Herpes labialis or herpetic gingivostomatisis has phases of outbreaks and remissions. The latest treatment modality is the use of lasers and has been reported to be very successful.

Yes: You need to conrol your onset and outbreaks with oral medication. The medication is very expensive if you do not have medical/drug insurance coverage. The herpes virus remains latent inside of your nerve tract until it becomes active by stress, hormonal changes and etc.