What happens to you when a bug or worm crawls up in your nose while your sleeping?

If a bug or worm crawls up your nose while you are sleeping, it is highly unlikely that it would survive due to the presence of mucus and hairs in the nasal passages that help trap foreign particles. Your body's natural defense mechanisms such as sneezing, coughing, and nasal secretions would likely expel the intruder before any harm is done. If you have concerns, consult a healthcare provider for further evaluation.