Cold sores are caused by a virus called the herpes simplex virus (HSV). This virus is very common and
it’s estimated to affect approximately 67% of the world’s population. The virus is caught by coming
into contact with other people with an active infection. This is often during childhood when
children come into close contact through activities such as play.
For most of your life, the virus will lie dormant in your skin, suppressed by your immune system.
Occasionally the virus will reactivate causing a cold sore. This is often when your immune system
is temporarily weakened, for example through stress or illness.
MedExpress offers a range of treatments for cold sores. Complete a free
online consultation to see which treatments are suitable for you, and get them delivered
straight to your door if prescribed.
MedExpress offers two anti-viral treatments: aciclovir and valaciclovir. The two medicines are all
comparable in their effectiveness. Aciclovir is more cost-effective but needs to be take more
frequently than valaciclovir.