Cold sores, caused mainly by HSV-1, are contagious blisters often spread through direct contact. Symptoms include tingling, blisters, and scabbing, typically lasting 7–10 days. Triggers include stress, illness, sun exposure, and hormonal changes. While there’s no cure, antiviral meds and creams can ease outbreaks. Prevention includes avoiding contact during outbreaks and not sharing personal items.

Link Between Gum Disease and Alzheimer’s?

New research suggests gum disease bacteria may play a role in Alzheimer’s. Scientists found toxic enzymes from P. gingivalis in brains of people with Alzheimer’s and even in those without a formal diagnosis. This raises questions about whether brain infection may trigger the disease. A compound targeting these toxins showed promising results in mice.