If you wipe away the discharge caused by pink eye with your fingers, it can introduce bacteria into the eyes, so it's not advisable.
こんにちは！
ご質問ありがとうございます。
ご質問について、いくつか言い方が考えられますが、例えば、
If you wipe away the discharge caused by pink eye with your fingers, it can introduce bacteria into the eyes, so it's not advisable.
とすると、『結膜炎によって出る[目やに](https://eikaiwa.dmm.com/uknow/questions/10298/)を指で取ると細菌が目に入るので良くない』となります。
参考になれば幸いです。
When a person gets pinkeye, they get a build-up of puss in the corner of their eye. If they try to get it out with their finger, they can get germs from their finger in their eye, which isn't good.
この場合、次のような言い方ができますよ。
ーWhen a person gets pinkeye, they get a build-up of puss in the corner of their eye. If they try to get it out with their finger, they can get germs from their finger in their eye, which isn't good.
「結膜炎になると目やにがでるが、指で取ろうとすると指についている雑菌が目に入りよくない」
ご参考まで！
日本 
カナダ 
