A brown discharge at 50 days of pregnancy is a possibility of preterm miscarriage. If the progesterone is low or the blood HCG level is low, it may also cause a brown discharge. If the cervix or vaginal wall is irritated during intercourse, it may also cause brown discharge. If you are overworked, stressed, or stay up late, it may cause brown discharge. First of all, go to the hospital for a blood test for progesterone including HCG, and depending on the situation, prophylactic fertility treatment can be administered. At the same time, a black and white ultrasound should be performed to determine if there are any abnormalities in the fetus, and depending on the situation, fetal preservation treatment should also be performed. When you go home, try to rest in bed and do not overexert yourself to avoid accelerated bleeding. You should also pay attention to your diet, do not eat spicy and stimulating food, raw and cold food, so as not to cause abnormal bleeding.