Menstruation has been coming on and off for 9 days, and after improving for 2 days, it came back again. How is this possible?

Patient's question:

Detailed medical condition and consultation purpose: To understand the condition
Duration of the current illness and persistence: 1.2-1.10
Medical history: Had a similar condition several years ago, improved with Chinese medicine
Previous diagnoses, treatments, and outcomes: Improved with Chinese medicine
Auxiliary tests:

Doctor's answer:

If you experience bleeding again one week after your menstrual period has ended, it could be ovulation bleeding. However, you should also be cautious of possible inflammation or endocrine disorders. It is recommended that you undergo a check-up based on the timing of the bleeding, and then take appropriate treatment measures according to the results of the examination.