If the rash is blistery then the cold sore (herpes simplex) could have spread and this is treated with aciclovir cream and suspension. If the rash has yellow crusts this would indicate a bacterial infection and would require antibiotics. The other possibility is a secondary fungal infection due to your son licking his sore lips! This is treated by an antifungal cream.
Unfortuantly the only way to tell is either to see it or swab it. As using the wrong product will just delay healing.
If you could upload a photo, I may be able to tell from a distance, otherwise you will need to wait until his doctor can see him. Treat him in the meantime with junior tylenol or ibuprofen suspension. Appy some White soft paraffin to keep it soft and act as a barrier if it is very crusty, but wash your hands thoroughly afterwards.
Keep his sponges, towels etc away from the rest of the family for the moment.
Regards
Edited by plaw123 on April 20 2006 at 8:38am
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