How does the sixth day after abortion have brown blood to return a responsibility

The sixth day after female abortion surgery, brown blood outflow, may be caused by congestion in the uterus, and uterine contractility has a certain relationship. If the female abortion surgery does not flow clean, resulting in the presence of residues in the uterus, this performance will be caused. If the female abortion does not pay attention to the cleanliness of the perineum, resulting in infection will also appear this symptom.