| | Conditions & Treatments | Cold & Flu Can cold sores turn into impetago? No, cold sores cannot turn into impetigo. Cold sores are caused by the herpes simplex virus, while impetigo is a bacterial skin infection. Cold & Flu - Related Articles Herbal Remedies for the Common Cold How to Improve Immune System Resistance to Flus How This Might End: Lessons From the Spanish Flu What is the Purpose of an Expectorant? How to Get Rid of a Bad Cough Fast Treatment for Mucus in the Throat Natural Remedies for Chest Congestion