If you are willing to support some pain for getting rid of the nasty fever blister, apply some salt on them. It is indeed unpleasant, but try to do so a couple of times a day and to keep the salt there for at least half a minute. A less painful home remedy for cold sores is aloe juice.
Black Walnut which is known as the “cure” for cold sores. It has natural antiseptic qualities and it contains iodine which can be effective in curing open blisters. Using this as a topical remedy or an internal remedy is wise.
Apply Isopropyl alcohol, when applied directly to the blisters, helps destroy the virus as it tries to spread. By applying alcohol you will successfully be limiting how big the sores can get, as well as speeding along the process to let them crust over and heal.
Application of ice is also very effective for preventing the further growth of virus. So you must rub the cube of the ice on the affected areas for 10 minutes and in every hour to reduce the symptom of this problem.
Petroleum jelly can be applied to fever blister to moisturize and soften them so can help to prevent them from cracking and bleeding.
Simple changes in the diet will help you to get rid of cold sores. If you are considering diet as home remedies for fever blisters, then you should completely avoid nuts and chocolates. As these foods are rich in arginine, the herpes virus gets activated. So stay away from them.