Cold sores, or fever blisters, are caused by the herpes simplex virus (HSV-1). After the initial infection, the virus stays dormant and can reactivate due to triggers like stress, illness, or sun exposure, leading to painful blisters around the lips, nose, or chin. Antiviral medications such as acyclovir can speed up healing while over-the-counter,

creams and natural remedies like aloe vera or tea tree oil may help ease discomfort.To prevent outbreaks, it’s important to avoid triggers, maintain a strong immune system through a healthy lifestyle, and practice good hygiene. Regular handwashing and avoiding shared personal items can also help prevent spreading the virus.