Will was stressed. And overworking himself. And not caring about his health in general. Ever since the Battle of Manhatten, there'd been a shortage of healers in Camp Half-Blood: that was not good. He was one of the only healers (yay), and the infirmary was packed full of people. So, so, so many people. He didn't know how he could handle them all.
After caring for a patient (some guy who was unlucky enough to get one of his limbs chopped off- Paolo?), Will Solace turns away from the infirmary bed (situated with a person with 4 limbs again), and exhausted look on his face. His expression looked like one his boyfriend, Nico, wears a lot. That was a clear indication he was not doing so well in the mental department. He pinches the bridge of his nose, readying himself for the other 12 campers in the infirmary, when he notices a familiar face stepping inside the building.