"DISORDER" A disease may be a disorder but a disorder is not a disease. "disorder" means something not quite normal in the negative sense. If you are born with a skin discoloration, then that is a disorder because it does not affect the normal functioning of the skin. So it is not a disease.

'Disorder' means something that is wrong, or, at least, not right. 'Order' is something that works in a particular pattern or sequence. Therefore 'disorder' means something that is not in a pattern - it is irregular. It is often used to talk about people who have medical or mental health conditions that do not work in the 'normal' sequence. Disease is something viral - it infects the body. As the original comment says, "A disease may be a disorder but a disorder is not a disease."