Aloe

Aloe vera is a great home remedy for cold sores. It reduces inflammation and fights bacteria, fungal infection, and has demonstrated effectiveness against the herpes simplex and herpes zoster viruses. It also contains compounds which boost the immune system, which can reduce the severity of an outbreak. There are lots of products out there that contain aloe, but I think it's best in its purest form, straight from the plant. It’s gentle on irritated skin, very soothing. Keep it in the fridge and it feels even better. I found some info on how to use the gel from the leaves, and some articles related to aloe and healing here: http://www.aloeplant.info