相思终成疾
[xiāng sī zhōng chéng jí]
This nickname, '相思终成疾 (Xiang Si Zhong Cheng Ji)' literally means that missing someone so deeply has made the person sick. It suggests that longing for a certain someone or something has affected the mental and physical well-being of this individual, as in Chinese culture, excessive emotions can be regarded as ailments.