When Mr. Gilmer cross-examines Tom Robinson, Dill starts crying and cannot stop. Scout takes him out of the courtroom because he is sick to his stomach.
The racism makes Dill physically ill during the trial. He begins crying when Mr. Gilmer is questioning Tom Robinson. Scout assumes that Dill hasn’t fully recovered from running away. Scout takes Dill outside the courthouse, where he explains.
It was the way he said it made me sick, plain sick … The way that man called him 'boy' all the time an' sneered at him, an' looked around at the jury every time he answered-" (ch 19)
Dolphus Raymond makes Dill feel better, metaphorically and physically. He lives life differently from most people in Maycomb, because he is married to a black woman.
"I know what you mean, boy," said a voice behind us. We thought it came from the tree-trunk, but it belonged to Mr. Dolphus Raymond. He peered around the trunk at us. "You aren't thin-hided, it just makes you sick, doesn't it?" (ch 19)
He pretends to be drunk, but really drinks Coca-cola. He demonstrates to Dill that not all people in Maycomb are racists, and gives him hope that the world will change.
Dill’s stomachache demonstrates the innocence of youth. Scout is too young to understand the full effects of the way Tom Robinson is being treated, and Jem is old enough to control his emotions. It is Dill who is old enough to understand but not old enough to deal with it.