It is normal to have yellow fluid underneath for 55 days after cesarean section usually due to the uterine incision, but you should still go to the hospital to rule out other causes. In the short-term postpartum leukorrhea will increase, known as bad dew, mainly due to the uterine cavity of the residual blood, meconium tissue or a small amount of endometrium absorbed and discharged, generally within 6 weeks can be discharged. 55 days has exceeded the 42 days of this situation need to go to the hospital for a retest. But generally the recovery of the uterine incision of cesarean section, uterine incision suture absorption, in this recovery process may have a little bleeding, there will be discharge, as long as the flow is not a lot, and there is no abnormality, usually no problem. However, other causes such as maternal weakness, maternal malnutrition, and maternal uterine cavity residue may also prolong the period of discharge, so in any case, a follow-up examination should be conducted as soon as possible to determine the cause, and treatment should be carried out according to the cause.