Maybe it's been up too late or had a scary encounter.
It could be due to the character being tired or having stayed up late. Maybe they've been through some intense emotions or stress.
It could be from lack of sleep or stress. Sometimes, if they're in a fight or have been crying, their eyes might get bloodshot.
Well, horror or thriller cartoons might have characters with bloodshot eyes to create a creepy or intense effect.
They can add a sense of intensity or drama to a character. Maybe it shows they're tired, angry, or have been through something intense.
It could imply that the cartoon eyes are showing signs of stress or fatigue and have a transparent quality.
Perhaps Doug has an eye infection or allergy that led to his bloodshot eyes. Or it might just be a part of the cartoon's artistic style to make him look a certain way.
Sometimes, bloodshot eyes in cartoons are used to indicate that the character is sick or has been overworking. It's a visual cue to tell the audience something's not right with them.
Maybe they're scared or in pain. Sometimes in cartoons, these expressions show intense emotions.
Cartoon characters having bloodshot eyes might be for comedic effect. It can make them look funny and exaggerated. Or it could imply they're not feeling well or have been through some kind of physical or mental strain.
They could represent a character who's been up all night or is very tired.