Some people get mouth ulcers when they first come into contact with HSV-1 virus. Others have no symptoms. Most of the time, symptoms usually occur in children between 1 and 5 years old.
Symptoms may be mild or severe. They often appear within 1 to 3 weeks after you come into contact with the virus. They may last up to 3 weeks.
Warning symptoms include:
- Itching of the lips or skin around the mouth
- Burning near the lips or mouth area
- Tingling near the lips or mouth area
Before blisters appear, you may have:
- Sore throat
- Swollen glands
- Painful swallowing
Blisters or a rash may form on your:
Many blisters are called an "outbreak." You may have:
- Red blisters that break open and leak
- Small blisters filled with clear yellowish fluid
- Several smaller blisters that grow together into a large blister
- A blister that gets yellow and crusty as it heals, eventually turning into pink skin
Symptoms may be triggered by:
- Menstruation or hormone changes
- Being out in the sun
If the symptoms return later, they are often less severe.