Gentamicin (injection) is diluted with water, and then gargle, not drink.

Go to the drugstore to buy some oral patches for treating ulcers. Although you are not an ulcer, you are also inflamed and suppurated. Generally, oral patches are dexamethasone hormone anti-inflammatory drugs (don't worry, local use will not cause serious side effects of hormones), which can relieve symptoms.

Continue to take antibiotics, Yinhuang granules have little effect.