Shao Hua's coworker was about the same height as her. However, the coworker's white face had two obvious butterfly-shaped red patches. Zhang Fan was quite certain what she had: systemic lupus erythematosus! Why had he sighed? That was because this disease was incurable!
Any disease which had the word "systemic" in its name would mean that it was truly troublesome to deal with. Lupus was a classical example of a disease which would express itself all over the body. The disease was in the blood vessels, and it would show on the entire body. Since blood vessels were everywhere in the body, this meant that every single organ would be affected by this disease.