Cold Sore is caused by a viral infection of the ganglia and it is a condition which can be very painful and long-lasting if not treated properly. The infection is usually accompanied by skin blisters. In order to get rid of cold sore, we have to reinforce our nervous cells with the help of neurotonics (nervines), antimicrobials which will help our body battle the infection and analgesics, in the form of relaxing neurotonics, in order to reduce the pain. A useful combination is the following: