Here is the translation of the given text into English: "Arrived for two days, black viscous fluid is menstruation?"

Patient's question:

No

Doctor's answer:

Hello, according to your description, delayed menstruation and abnormal menstrual blood are symptoms of menstrual disorder. It is recommended to take traditional Chinese medicine under the guidance of a doctor, pay attention to menstrual hygiene, avoid cold foods, and avoid catching a cold.