You can consult your doctor and he will prescribe you some medicines that are available for these diseases but remember that this medication may not have 100 percent success rate and they may also come with some side effects. Especially if you have some other disease like diabetes or high blood pressure then, these medicines can be really dangerous for you. You should consult your family doctor for more proper and effective medicines that should give you no side effect. The best method is to adopt natural cold sore remedies because most of these remedies will come without any side effect.