5 Seconds of Summer's Michael Clifford managed to get an infection during his time off.

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The guitarist revealed on Twitter Saturday, "I have an infected eye? Or eyelid?"

He didn't even know something like this was possible!

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A fan suggested it's pink eye, but Clifford said it definitely is not pink eye.

Fellow Australian singer Troye Sivan told Clifford it's probably pink eye as well, but he also shared why the 5SOS member would get pink eye.

It spurred Clifford to tweet, "s--t," but it's all a big joke.

Sivan also said Clifford's eye problem might "be a stye." Sivan cautioned Clifford to "be careful" if that is what he has.

Fans have been sending Clifford sweet "get well" tweets since he revealed he has an infection.

One fan made a pun by telling Clifford "gotta keep an eye on it".

Another fan wondered if Clifford actually saw a doctor or was just being his own doctor with the help of Google.

Someone else recommended Clifford should "buy some eye drops".