Quick Glance: Common Preeclampsia Symptoms
Common signs and symptoms of preeclampsia include:
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High blood pressure detected during routine pregnancy check-ups
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Protein in the urine can be identified through urine testing
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Severe or persistent headaches
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Blurred vision, flashing lights or seeing spots.
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Upper abdominal pain
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Nausea and vomiting, particularly when these symptoms occur after the first trimester.
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Swelling of the hands and face
Preeclampsia Symptoms That Should Not Be Ignored
Preeclampsia is a serious pregnancy condition that can develop without obvious symptoms. Some signs may also be mistaken for normal pregnancy changes, making regular prenatal check-ups important for detecting changes such as high blood pressure and protein in the urine.
However, certain symptoms require prompt medical attention and should not be ignored, including:
| Warning Symptom | What It May Indicate |
| Severe or persistent headache | A headache that does not improve may be a sign of worsening preeclampsia. |
| Changes in vision | Blurred vision, seeing spots or flashing lights, or temporary vision loss, may indicate severe preeclampsia. |
| Severe upper abdominal pain | Pain, particularly in the upper right abdomen or under the ribs, can be a warning sign. |
| Shortness of breath or difficulty breathing | May occur when fluid builds up in the lungs and can indicate a serious complication. |
| Sudden swelling of the face or hands | Rapid or unusual swelling may be associated with preeclampsia. |
| Sudden weight gain | Rapid weight gain may result from excess fluid retention. |
| Nausea or vomiting | New or worsening nausea and vomiting later in pregnancy may require medical evaluation, especially with other symptoms. |
| Reduced urine output | Impaired kidney filtration (glomerular damage) caused by preeclampsia-induced vascular inflammation, signalling potential acute kidney injury. |
Why Do Preeclampsia Symptoms Occur?
Preeclampsia symptoms are thought to occur due to abnormal placental development and reduced blood flow to the placenta (the organ that supplies oxygen and nutrients to the baby). To cope with low oxygen, the stressed placenta releases high levels of anti-angiogenic proteins (specifically sFlt-1) into the mother's bloodstream. These proteins neutralise the body's natural vessel-repair factors, damaging the lining of blood vessels throughout the mother's body and causing them to constrict and leak.
The resulting blood vessel dysfunction and reduced blood flow can affect organs such as the kidneys, liver, brain and lungs. This may lead to high blood pressure, protein in the urine, headaches, vision changes, abdominal pain, swelling and breathing difficulties.
Preeclampsia Symptoms That Require Immediate Medical Attention
Seek urgent medical attention if the following preeclampsia symptoms appear:
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A severe, persistent headache
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Blurred vision, flashing lights or loss of vision
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Severe pain below the ribs or in the upper abdomen
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New or worsening breathlessness
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Sudden swelling of the face or hands
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Severe nausea or vomiting later in pregnancy
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Very little urine
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A sudden feeling of being seriously unwell
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A seizure
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Loss of consciousness
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Severe confusion or inability to wake normally
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Severe breathing difficulty
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Sudden weakness, facial drooping or difficulty speaking
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Severe chest pain
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Heavy vaginal bleeding with severe abdominal pain
Symptoms of Preeclampsia Based on Type
Preeclampsia is categorised based on how severe the features are and when they develop during the pregnancy. The following are primary clinical classifications of preeclampsia:
| Type of Preeclampsia | Common Symptoms and Signs |
| Preeclampsia Without Severe Features | Blood pressure ≥ 140/90 mmHg (on two occasions after 20 weeks) with proteinuria (≥ 300 mg/24 hours or protein/creatinine ratio ≥ 0.3) or new organ impairment without severe features. Often asymptomatic, making routine screening essential. |
| Preeclampsia With Severe Features | Very high blood pressure, severe or persistent headache, blurred vision, flashing lights or vision loss, severe upper abdominal or rib pain, breathlessness caused by fluid in the lungs, reduced urine, abnormal liver or kidney function and low platelet levels |
| Postpartum Preeclampsia | High blood pressure developing after delivery, severe or persistent headache, blurred vision or seeing spots, upper abdominal pain, nausea or vomiting, sudden swelling and difficulty breathing; it can occur even after normal blood pressure during pregnancy |
Symptoms of Preeclampsia in Women
Usually, preeclampsia is detected after the 20th week of pregnancy., However, it can sometimes develop after a baby is born. This is known as postpartum preeclampsia and may occur in the days or weeks following delivery.
Warning symptoms can include almost the same as during pregnancy, which include severe or persistent headache, blurred vision or other visual changes, pain below the ribs or in the upper abdomen, shortness of breath and sudden swelling of the face or hands.
Can You Have Preeclampsia Without Symptoms?
Yes. Preeclampsia can develop without obvious symptoms, particularly in its early stages. A woman may feel completely well while having high blood pressure or protein in her urine.
This is why routine antenatal care is important. Blood pressure measurements and urine tests can identify possible signs of preeclampsia before symptoms become noticeable. Some women may only develop symptoms when the condition becomes more severe.
When Can Preeclampsia Symptoms Become Life-Threatening?
An overview of preeclampsia symptoms becoming life-threatening through progression is given in the table below:
| Emergency Complication | What Can Happen |
| Eclampsia | Seizures occur during pregnancy or after childbirth and may cause loss of consciousness, injury or reduced oxygen supply. |
| HELLP Syndrome | Red blood cells break down, liver enzymes rise, and platelet levels fall, increasing the risk of liver injury and bleeding. |
| Stroke | Severely raised blood pressure may damage or block a blood vessel in the brain. |
| Pulmonary Oedema | Fluid accumulates in the lungs, causing severe breathlessness and reduced oxygen levels. |
| Acute Kidney or Liver Injury | Reduced blood flow and inflammation may impair organ function. |
| Placental Abruption | The placenta separates from the uterus before delivery, potentially causing abdominal pain, bleeding and danger to the mother and baby. |
| Serious Fetal Compromise | Reduced placental blood flow may restrict the baby’s growth or reduce oxygen and nutrient delivery. |
How are Preeclampsia Symptoms Diagnosed?
Preeclampsia is diagnosed through repeated blood pressure readings and evidence that the kidneys, liver, blood, brain, lungs or placenta may be affected. It usually develops after 20 weeks of pregnancy or during the postpartum period.
The symptoms of preeclampsia can be diagnosed through the following methods:
| Diagnostic Test or Assessment | Purpose |
| Medical and Symptom History | Identifies warning symptoms and risk factors |
| Blood Pressure Measurement | Checks for hypertension, a key sign of preeclampsia |
| Urine Protein Test | Detects proteinuria, which may indicate kidney involvement |
| Blood Tests | Assess platelet levels, liver function and kidney function |
| Liver Enzyme Tests | Look for signs of liver involvement |
| Platelet Count | Checks for low platelets, which can occur in severe disease or HELLP syndrome |
| Kidney Function Tests | Assess whether the kidneys are being affected |
| Ultrasound Scan | Monitors fetal growth and assesses the baby's well-being |
| Fetal Monitoring | Check the baby's heart rate and well-being when clinically indicated |
Note: A blood pressure of 140/90 mm Hg or above may indicate high blood pressure and is usually checked again to confirm the reading. When blood pressure reaches 160/110 mm Hg or higher, it is considered as severe and needs immediate medical evaluation.
FAQs
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Q1. What is usually the first sign of preeclampsia?
Ans: The first symptom of preeclampsia is usually high blood pressure, which is detected during an antenatal check-up. Not all women will have noticeable symptoms. -
Q2. Do you feel sick if you have preeclampsia?
Ans: It depends. You may feel unwell, but not everyone with preeclampsia experiences symptoms in the early stages. Some women may have nausea, vomiting, headaches, or abdominal pain, particularly when the condition becomes more severe. -
Q3. Can preeclampsia occur without protein in the urine?
Ans: Yes. Preeclampsia can occur without protein in the urine if high blood pressure occurs with signs of organ or placental dysfunction.
