Cold sores, medically termed as recurrent herpes labialis are basically small blisters which are very itchy and cause a stinging sensation. It mainly occurs on mouth or outside of the lips but sometimes can appear on fingers, chin and nostrils. It lasts for 7 to 10 days and oozes fluid or sometimes forms a yellow colored crust.

The sores are caused by Herpes Simplex Virus (HSV); it can simply pass by skin contact. The small breaks and cracks in the skin allow the virus to enter and infect th...
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