Cold sores come from HSV-1, a virus that stays dormant in your facial nerves after the first infection and reactivates when you are run down - stress is one of its named triggers.
That is why outbreaks land during big weeks. Episodes start with tingling, then blisters within 48 hours, and heal within about 10 days. Pymander is a free AI doctor, 24/7 by text, and can help you spot your trigger pattern.
What to do
Common questions
Why do I get cold sores when I'm stressed?
The virus is the constant; stress is the alarm clock. Cold sores come from herpes simplex virus type 1, which most people pick up earlier in life. After the first infection, MedlinePlus explains, the virus goes dormant in the nerve tissue of your face - it never leaves. Later, certain triggers wake it up, and stress is on the list, alongside fever, sun exposure, and menstruation or hormone changes. When you are stressed, run down, or fighting another illness, your immune system has less capacity to keep the sleeping virus suppressed, and it travels back down the nerve to the lip. That is why the blister arrives during your busiest week or just before the event you were nervous about. The sequence is predictable: a tingling, itching, or burning feeling first, then painful blisters over the next 48 hours, then a scab - the NHS says cold sores should start to heal within 10 days, and repeat episodes are usually milder. They are contagious while they heal, so no kissing or sharing lip balm during an outbreak. A pharmacist can suggest antiviral creams, which work best started at the first tingle. Frequent or severe outbreaks are worth a GP conversation. Pymander is a free AI doctor, 24/7 by text, that can help you spot your trigger pattern.