Well, you can go to the clinic and buy a tube of gentamicin, a tube of 5 mg dexamethasone, and a syringe. Use the syringe to draw out the two medicines, then pull out the needle and point it at your throat. Spray, keep the medicine in the throat, do not swallow, wait about 5 minutes before swallowing, do not drink water for half an hour after swallowing, the taste is a bit bitter, bear with it, the effect is very good.