If edema occurs during pregnancy, how to eliminate this edema needs to be judged according to different situations, if it is unilateral or localized limbs, trunk edema, may be mosquito bites, allergies, or local inflammation caused by the need to actively target the corresponding lesions to do the appropriate treatment. If the edema is generalized, especially common in bilateral lower limb edema, it may be the normal reaction of pregnancy, how to judge this normal reaction, according to the time of edema and other associated lesions to judge; if edema appeared before 20 weeks, it may be renal lesions, the need to do routine urinalysis; if the urine is positive, that is to say, the discovery of protein, it may be pre-pregnancy. Kidney lesions, only after pregnancy pregnancy makes kidney lesions aggravated, edema; if this edema appeared after 20 weeks, accompanied by protein in the urine, high blood pressure, it is likely to be hypertensive disorders of pregnancy, which is a common complication of pregnancy, and need to be in the pregnancy after the swelling can not be completely eliminated.