Andorian herpes
Andorian herpes was an Andorian ailment which, behind-the-scenes,  was once said to suffer from.

While filming ,  actor Karl Urban ad libbed a line in which he, as McCoy, said he had noticed that Kirk's Andorian herpes had returned, and advised Kirk to "pop by the med bay." ("Gag Reel",  Blu-ray special features)

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