The bitterness in the throat of eye drops is clinically considered to be the result of eye drops entering the nasolacrimal duct through the tear dots and tear sacs, and the nasolacrimal ducts happen to open in the lower nasal passage, resulting in the bitterness in the throat through the nasal ducts, and the bitterness is mainly the taste of eye drops. For this situation, it is recommended that patients can do the following: 1. It is recommended that patients blink their eyes after each eye drop, so that the eye drops are evenly distributed in the eye area to avoid too much of the drops entering the nasal cavity through the nasolacrimal duct. 2. If patients feel bitter in the throat, they can strengthen the gargle. If there is still eye drops in the nasal cavity, you can do nasal rinsing treatment to rinse the drops away, which usually does not lead to very serious consequences.