"Doc? Have you got a minute?" John Sheppard stood in the doorway to the infirmary, shifting nervously, whilst simultaneously scanning the room with well trained eyes.

"Aye lad. Of course. What can I do for you?" Carson looked up from the microscope he had been using, and made his way over to John, noting the way that he was wringing his hands, as though he were nervous about something.

"I have a little problem."

Oh, aye. Well, why don't you come and sit down, and we'll see what we can do." If John's nervous behaviour wasn't enough to get Carson worried, the way that he eyed the exam bed as though it might bite him if he sat down did.

"Erm, is there someplace private we could go. This is kind of embarrassing." John shifted nervously from foot to foot.

Carson was torn between laughing, and feeling concern at that last statement. He was sure that he, and his staff had seen the Colonel in every possible embarrassing position, and situation possible since coming to the Pegasus Galaxy, but saying that, he didn't like to get too complacent, he had seen and done a lot of unexpected things in his time on Atlantis. He was beginning to think that nothing would surprise him anymore.

"We can go into the isolation room if you like Colonel." Carson ushered John towards the room, even though he knew that John knew the way, the Colonel seemed to be fixated on his hands, which he was nervously rubbing together, rather than in the direction that he was walking.

Upon reaching the isolation ward Carson gestured to the bed that stood in the centre of the room, and John obediently hopped up. "Now, Colonel. Would you mind telling me what this is all about?"

John, still staring fixatedly at his hands, said quietly. "I have a slight problem."

Carson was beginning to feel exasperated, trying to get information out of the Colonel was like trying to pull teeth. "Yes Colonel, you already said that. Now would you care to tell me what your little problem is."

John's face flushed red, before he replied, "I have a rash, in a very private area."

Carson couldn't help but roll his eyes, and sigh with relief. Usually when the Colonel said he had a 'little problem,' it meant 'I have serious life threatening injuries', or 'I'm about to be sucked dry by a very hungry Wraith. Rash's were easy, rash's he could deal with. "Well then Colonel, you'd better let me have a look then."

Carson couldn't help but laugh out loud at the look of dread that crossed John's face, "Come now Colonel. It's not as if I haven't seen it all before. Lots of times in your case."

Sheppard huffed, before replying, "Yes, well all of those times I was too out of it to know what the hell you were doing."

"Stop being such a big baby."

"I am not being a baby."

"Well then drop your trousers and let me take a look."

"Fine" John pouted, before pulling his pants down.

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John pulled his pants up as quickly as possible, while Beckett threw his gloves in the trash.

"Well it looks to me as though you are allergic to something Colonel. Have you come into contact with anything unusual lately, anything off world."

"Carson, we're in another galaxy, going to alien planets everyday, meeting alien cultures. How much more unusual can you get?"

Carson wanted to sigh in frustration. "I was thinking more of coming into contact with anything unusual in that area." When John frowned as though thinking, Carson added, "Or anyone."

Carson watched as John's gaze became glazed, as though he has daydreaming. That look changed to one of contentment, and then horror. "Oh my God, I'm allergic to Rodney!"

Carson felt his eyebrows rise up to meet his hairline. He was wrong. There were still things that could surprise him.