Cold sore symptoms typically emerge four to seven days after infection; however, in some cases, symptoms may take months to appear. Cold sore lesions usually persist for one to two weeks. These lesions are most commonly found around the lips, tongue, or the mucous membrane lining the inside of the mouth.
Cold sores initially appear as fluid-filled blisters that rupture within one or two days. These blisters release fluid containing the virus. After a few days, the sores will crust over.
The virus is highly contagious and spreads rapidly through direct skin-to-skin contact.
Key symptoms of cold sores include:
* Skin blisters or fluid accumulation, itching, and mild fever
* Fluid-filled blisters and redness around the lips, gums, and mouth generally
* Irritation of the lips and mouth
* Muscle aches