Nails coming loose are read as losing grip or protection in small daily matters. Dream books link the image to feeling exposed, worn down or unable to hold on to something you used to manage easily. A single nail falling off points to one specific worry, while all of them going at once suggests a sense that many small things are slipping together. The dream is read as a picture of strain, not as a sign about the body. It can help to ask which of your everyday tasks has started to feel too heavy.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.