Under normal circumstances, the milk should be clean about twenty days after the cesarean section. If the milk is not clean for a month, you should observe the color and volume of the milk, and also see if there is a bad odor. If there is a foul smell and the color of the nightmare is dark red, it is considered to be caused by inflammation and infection, so you need to treat it with anti-inflammatory drugs in time. If the blood is fresh, it may be caused by poor contraction of the uterus or by the incision in the uterus that did not heal completely during the cesarean section. You need to do ultrasound examination in time to determine the condition and then take symptomatic treatment. During this period you should pay attention to hygiene, pay attention to washing and do not overwork.