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 the person. There are two types of herpes simplex virus; Type 1 is known as oral ...