How to treat red mouth with blisters

Patient's question:

My child's lips are the same again for the second time (both red and with blisters). At first, the lips were very red, and then blisters reappeared on the third day, with the lips feeling a bit warm.
Previous treatment and effectiveness: Applied an eye drops, but it had no effect.
What kind of assistance is needed: Hello doctor, what medicine should be used, or what should be digested? Thank you.

Doctor's answer:

According to your description, the simple herpes around the child's mouth is mainly caused by HSV-1. This disease is self-limiting and can heal within about 2 weeks.
Recommendations: In clinical diagnosis, treatment should focus on drying, soothing, and preventing transmission. External applications such as 1% zinc chloride oil or pu gong ying oil can be used. In terms of diet, avoid nuts, chocolate, and seeds, and instead consume lysine-rich foods such as kidneys and beans.

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