Q I have a recurrent cold sore, but conventional treatments are ineffective. I have read that Tea Tree Oil is helpful but am unsure how to use it. Can you offer any advice?

A Cold sores are caused by the virus Herpes Simplex which most of us carry in our body but without symptoms. Cold sores can often appear when the body is fighting another infection, such as a cold (hence the name cold sore). It is important therefore, that your diet contains plenty of fresh fruit and vegetables, as these will help to strengthen the immune system.

You could also try taking Echinacea, a herbal extract that is used to stimulate the immune system. There are certain essential oils which can also help treat the blister. Apart from Tea Tree, Eucalyptus, Geranium, and Rose Otto are all said to be quite effective. I suggest that you put six drops of your chosen oil, (or three drops each of two oils), into 10ml of carrier oil, such as Grapeseed, and apply over the blister several times a day.

It is best to purchase your oils from a reputable wholesaler, such as a health food shop or Culpeppers. You can measure the carrier oil in a medicine cup (chemist shops sometimes give these free). As for which oils to choose, go for the one(s) with an aroma you are attracted to.

The best results are obtained if you apply the mixture at the very beginning of the cold sore, as it can often help prevent the blister from erupting. If you are interested in learning more about the therapeutic properties of essential oils and products, I will be giving a free talk at The Dove Court Centre in Haxby on Saturday September 1, 10am-noon. For further information call 01904 750199