Hello, the battery mistakenly enters the nasal cavity, which may burn the nasal cavity at first, and then cause local infection due to foreign body stimulation, resulting in increased secretion, stuffy nose and unpleasant smell. If you cry and inhale the trachea, you may also form a foreign body in the trachea, and there may be a small amount of bleeding for a short time after taking out the foreign body. Suggestion: Please don't worry. It is recommended to keep the child's nasal cavity clean and avoid digging the nasal cavity. It can diminish inflammation for a week and prevent infection.