While they may not seem connected, the health of your digestive system can have an impact on the growth of nail fungus. Healthy gut bacteria can help prevent the growth of fungi and microbes in the body; an imbalance of flora in the digestive system can lead to fungal overgrowth. Maintaining gut health can help minimize the spread of nail fungus and keep it from returning in the future.
I think she means put as much salt under the actual nail (as these infections tend to lift the nail) also place on top of nail especially where the cuticle is. Try that. Salt water also kills the bacteria that causes eczema to become infected. Salt is a good all rounder for many things! But you must use a pure salt. Celtic salt or himilayan salt which looks pink in colour. You will find it at most health shops.
Try Cinnamon Leaf Oil as is a very powerful anti-fungal and dries out the nail nicely. In my case it helped to flake off the nail that was full of fungus until a new nail started to grow. Don’t know how I lived with it for so long. Apple Cider vinegar was too mild for me. Apparently to prevent it from coming back you really have to drink Cinnamon Tea (not Cassia Cinnamon which can damage your liver). I discovered I was eating all the wrong foods and my whole body was infested with a Candida overgrowth. Drinking the Cinnamon tea really cleaned up my system. I don’t eat too much sweets or dairy anymore, which seems to be the key. Oh yeah one more thing you really have to keep your toes dry and clean. I threw all my shoes and socks away, but well worth it for the results. If you want fast results, you really have to go with Cinnamon Leaf Oil. Since then I have been using the Cinnamon oil all around the house to disinfect and get rid of bad smells and mold in the bathroom. This oil is fantastic.