A little brownish leucorrhea in the third trimester usually occurs only when there are signs of miscarriage. During this period, you should pay attention to absolute bed rest and observe the size of the bleeding. If the bleeding can be relieved and improved after bed rest, no special treatment is needed, and you should try to relax and not be too nervous, and forbid sex. If the leukorrhea is brown and there is obvious pain in the stomach, you should go to the hospital in time for a checkup. If it is determined that there are signs of miscarriage, you need to treat it with fetal preservation drugs to avoid miscarriage. During this period, you also need to pay attention not to eat spicy and stimulating food to avoid stimulating the uterus contraction, resulting in uterine cramps and increasing the chance of miscarriage.