You don't look so well

A sick whumpee comes in many shapes and colors.

Animes
Kyou Kara Maou


 * Ep 14: Gwendal and Yuuri are captured, mistaken for running lovers, and are taken to a "trial". But as they are on human territory, and next to a mine of all places, the amount of Houryoku emanating is painful to Gwendal, who is weakened by it. Yuuri supports him and helps him walk.

Magic Knight Rayearth


 * 2x14: It's revealed that Eagle Vision is severely ill, when he has a coughing crisis (with blood) in front of his friend. So sick, that betraying someone he cares about seems less important than the mission, since he is about to die anyway.

TV Shows
Andromeda


 * 1x04: The ship, in order to hide itself from enemy attack, receives a considerable quantity of radiation, and Seamus Harper (Gordon Michael Woolvett) is the first one to be affected by it. He coughs a few times, and is very weak in general.

Grey's Anatomy


 * 2x19: Denny Duquette (Jeffrey Dean Morgan) returns to the hospital with his failing heart.

Kyle XY


 * 2x20: Kyle 's (Matt Dallas) brain starts to "glitch"; he forgets things, bumps into objects, sleepwalks, loses track of time, feels pain from enhanced sounds... Anyway, there's something wrong with him, and everyone is worried.

New Amsterdam


 * During the whole first season, Max Goodwin (Ryan Eggold) battles against a throat cancer. Many emotional moments when the people around him found out and with him dealing with this new reality. At 1x11 he starts his treatment and suffers with the side effects of it.

Once Upon a Time


 * 1x20: August W. Booth (Eion Bailey) is "sick", slowly returning to his wood form (he being Pinocchio and all), for all the mistakes he have made on his life. First are his legs, which makes him collapse and grunt in pain from time to time.