Hello, there are blisters on your lips. You can consider herpes labialis, which is caused by herpes simplex virus. It is called "excessive internal heat" in Chinese medicine, and it usually occurs on your lips and mouth. The course of the disease is about one week, and it is easy to recur.

Suggestions:

Don't use erythromycin eye drops externally, you can use acyclovir ointment or penciclovir cream externally, take levamisole orally, need a new toothbrush, pay attention to the dryness of your mouth, and eat more fruits and vegetables. Quit smoking, drinking and dried fruit.