Headaches and neck pains are just the beginning for Sgt. Wu (Reggie Lee) on Grimm.

Over the past couple of weeks, Wu has been experiencing various physical pains that require at least a visit to the chiropractor. He's been brushing off the spasms as normal office pain, but the symptoms are only getting worse.

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On Friday's episode of Grimm, viewers with weak stomachs may want to turn away when Wu hacks up his next biological clue to what his mysterious illness might be. The increasing severity of the symptoms indicates that the sergeant only has a limited amount of time to figure out exactly what's happening to him. Will he tell Nick (David Giuntoli) and the Scoobies — or, at the very least, go to a doctor — before this gets even more serious?

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