Routine prenatal visit must be adhered to. Patients are normally weighed, blood pressure is checked and urine is tested, among other things. Notice the long list of symptoms that preeclampsia may cause:

Hypertension
Proteinuria
Edema (Swelling)
Sudden Weight Gain
Nausea or Vomiting
Abdominal (stomach area) and/or Shoulder Pain
Lower back pain
Headache
Changes in Vision
Hyperreflexia
Racing pulse
Mental confusion
Heightened sense of anxiety
Shortness of breath or chest pain
Sense of impending doom

But in this article, we’ll discuss a few of the ones that would be most obvious to you. For instance, edema or swelling may arise. If you are swelling at an abnormal rate, especially in the face, around the eyes or hands this is cause for concern.

Now, everyone knows that pregnancy causes some swelling, but with preeclampsia, you may experience pitting edema ...

https://www.empowher.com/reproductive-system/content/signs-and-treatments-preeclampsia