If using the above methods doesn't reduce your swelling within a few days, see a doctor to determine whether an underlying problem may be causing your body to swell.  Severe swelling during pregnancy may be a sign of pre-eclampsia, a serious condition that causes high blood pressure along with swelling.  Certain medications can cause the body to swell up. Anti-depressants, hormone treatments, and blood pressure medication may lead to swelling.  Heart failure, kidney failure, and liver failure cause fluid to collect in the body and lead to swelling. Swelling in conjunction with other symptoms could mean you are experiencing heart, kidney or liver problems, and you'll need to seek medical attention right away. See a doctor if you have any of the following symptoms:  You experience chest pain.  You have shortness of breath. You are pregnant and have a sudden increase in swelling. You have a fever. You have diagnosed heart or liver problems and notice swelling. Your swollen body part is warm to the touch.

How would you rephrase that briefly using Vietnamese?
Đi khám bác sĩ nếu bạn bị sưng mãn tính. Hãy đi khám bệnh ngay lập tức nếu bạn đang gặp các triệu chứng nghiêm trọng.