This appears in your mouth, you should be very careful: it can be a war.ning sign

When Should You See a Doctor?
It’s a good idea to consult a healthcare provider if:

Outbreaks happen frequently or are unusually painful

Over-the-counter remedies aren’t helping

The sores spread beyond the lips or grew significantly in size

Pain interferes with eating, drinking, or speaking

You have a weakened immune system, which can increase complications