Hello,
From your description and the photo, these fluid-filled, painful blisters below your lip appearing after fever are most likely Herpes labialis (cold sores), a common viral infection triggered by fever, stress, or low immunity.
ð¹ What you can do now:
Apply Acyclovir 5% cream locally on the blisters 3â4 times daily for faster healing.
Keep the area clean and dry. Avoid touching or scratching the blisters as it can spread the infection.
For pain or burning, you may take Paracetamol if required.
Avoid sharing utensils, towels, or close contact (kissing) until lesions heal, as it is contagious.
Generally, these blisters heal within 7â10 days. If they keep recurring frequently (more than 4â5 times a year) or become very severe, an oral antiviral course may be required under medical supervision.
You can connect with me on Practo for a prescription and further guidance.
â Dr. Romain Rajan
General Physician
Answered2025-08-22 11:15:14
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