werewolf bloody nose
An upcoming transformation will bring out several things in the weighted one, one of which is not a bloody nose. If there are humans searching for symptoms that you may think are werewolf symptoms the bloody nose is not one. A bloody nose could happen for a number of reasons in humans and weighted ones, including; a dry nose, allergies, or simply blowing the nose too hard. But a bloody nose is in no way related to a possible nearing metamorphosis. It would be more likely a coincidence than a symptom.