What is the reason for dark menstrual blood?

Patient's question:

Patient gender: Male
Patient age: 25
What is the reason for dark menstrual blood?

Doctor's answer:

Hello, your condition can be checked with a B to examine the inflammation of the uterine appendages. If the B results are normal, it may be related to blood and qi stagnation. You can consult a traditional Chinese medicine practitioner and take Motherwort and White Chicken Pill to regulate your body. In daily life, pay attention to keeping warm and eating less spicy and irritating foods. Dark menstrual blood is caused by qi stagnation and blood stasis, where the menstrual blood accumulates in the uterus for a long time. Wish you good health.