There is no scientific basis that duck saliva does not soften fish spines. Patients should never get too nervous if they have a fish spike stuck in their throat, nor should they choke down the spike with a hard object such as a bun to avoid scratching and causing throat damage, infection, bleeding, etc. When a patient gets stuck, it is recommended to cough gently to see if the fish spike can be coughed out. If it cannot be coughed out, the patient needs to go to the hospital and have the fish spike removed after examination. If necessary, the patient may need a laryngoscopy to find the fish spike and remove it. There is no scientific basis for softening the fish spike by duck saliva or drinking vinegar, and it also tends to cause damage and infection in the throat, so patients who get stuck with a fish spike need to go to the hospital promptly and have it removed by a doctor.