9 Causes of Numbness and Tingling During Pregnancy

Pregnant woman with sciatic pain

Numbness and tingling during pregnancy are common causes of discomfort. These symptoms most often occur because of a disruption of signal transmission along a nerve (peripheral neuropathy). Check with your doctor or midwife before starting any treatment option during your pregnancy. In some cases, the numbness during pregnancy will improve or resolve after you deliver your baby.

Carpal Tunnel Syndrome

Carpal tunnel syndrome (CTS) is common in pregnancy and can involve one or both hands - usually your dominant hand, if only one is involved. As reviewed by the Mayo Clinic, CTS symptoms include numbness and tingling (pins and needles), and sometimes pain, in the palm side of your thumb, index, middle and part of your ring finger, your wrist and hand. Symptoms may be worse when you awaken in the morning.

If you have CTS before pregnancy it may worsen during pregnancy. Symptoms tend to occur more often during the third trimester and usually improve soon after delivery but may take 1-2 years to resolve. The earlier in pregnancy symptoms start, the longer CTS takes to resolve.

Cause

CTS symptoms are caused by pressure on or entrapment of the median nerve as it passes under a ligament that forms the carpal tunnel at your wrist. Symptoms occur in the fingers and areas that the median nerve serves. The problem is more common in women during a second or later pregnancy and those who do repetitive motions with their hands such as typing.

The risk for the syndrome increases during pregnancy because fluid gain can cause swelling of the tissues of your wrist and hand and compress the median nerve. Diseases such as hypothyroidism, diabetes and high blood pressure that may lead to further fluid retention can also increase the chance of CTS during pregnancy.

Treatment

Treatment of carpal tunnel syndrome involves reducing pressure on the median nerve. The Office on Women's Health includes the following treatment options:

  • Reducing your salt intake and drinking enough fluids
  • A wrist and hand splint to put your wrist in a "rest" position
  • Diuretics to reduce fluid retention
  • Steroid injections in your wrist to reduce swelling and inflammation
  • Decrease repetitive motions of the affected wrist
  • Pain medicines
Woman with carpal tunnel syndrome

Preeclampsia

Preeclampsia is a pregnancy complication that can occur after 20 weeks gestational age. Signs include high blood pressure, swelling due to fluid retention, and protein in your urine. At times preeclampsia can develop without symptoms which is why it's important to go to every prenatal visit so your blood pressure can be monitored. Typically, the first sign of preeclampsia occurs when there is a rise in blood pressure. It may slowly elevate or it can be a sudden onset. If preeclampsia is undiagnosed and untreated, it can cause serious and possibly fatal complications.

Numbness and tingling can occur in the hands and feet and is most likely due to the swelling associated with preeclampsia. The swelling can cause a lack of blood flow circulation or a nerve to be compressed which may cause a pins and needles sensation. The baby may be in a certain position where he or she rests on blood vessels preventing blood flow or rests on a nerve causing tingling, numbness and even pain. When this happens, it is best to move about and shake your arms and legs to get the blood circulating and possibly shift the baby. Other possible symptoms of preeclampsia include:

  • Severe headaches
  • Vision changes
  • Abdominal pain
  • Nausea and/or vomiting
  • Decreased or no urine output
  • Decreased levels of platelets in your blood (thrombocytopenia)
  • Impaired liver function
  • Signs of kidney problems
  • Sudden weight gain
  • Changes in reflexes
  • Shortness of breath and/or anxiety

Cause

It is believed that preeclampsia occurs due to the placenta not functioning as it should. In early pregnancy, blood vessels develop to specifically carry blood to the placenta. These blood vessels tend to be narrower in women with preeclampsia and don't function properly, therefore the amount of blood flow is limited to the placenta. This occurs because of:

  • Damage to the vessels
  • Insufficient blood flow
  • Immune system problems
  • Genetics

Treatment

The most optimal treatment for preeclampsia is the delivery of your baby. However, if you are too early in your pregnancy, the doctor will closely monitor you and your baby. That is why it is imperative that you go to every prenatal visit. Other forms of treatment include:

  • Medication that will help lower your blood pressure.
  • Hospitalization may be necessary to order to monitor the pregnancy. The doctor will perform nonstress tests and biophysical profiles to check the well-being of the baby.
  • Corticosteroids may be prescribed to help improve your liver and platelet function and will also help the baby's lungs mature in case of early delivery.
  • Anticonvulsant medications may be prescribed to help prevent seizures if your preeclampsia is severe.

Sciatica

Sciatica can occur before pregnancy from daily wear and tear or injuries to your back. Symptoms include numbness and tingling, burning or pain anywhere from your lower back, down your bottom and back of your leg, to the bottom of your foot and toes. Your symptoms may worsen as your pregnancy advances in the third trimester. If the problem is severe or prolonged, it can cause weakness of the leg on the involved side.

Cause

Sciatica is caused by irritation or compression of the sciatic nerve as it passes from your lower vertebrae through your pelvis and down the back of your leg. One or both sciatic nerves can be involved, though most often only one side is affected.

According to the Journal of the American Medical Association, common causes of sciatica includes herniation of a disc or arthritis in a lumbar vertebra, conditions which may be present before your pregnancy. During pregnancy other causes of pressure on the nerve include:

  • Fluid retention in tissues around the nerve in the back or in pelvic tissues
  • Curvature of the spine as your belly gets bigger (lumbar lordosis)
  • Compression along the pelvic wall during the third trimester as the baby gets bigger and as he moves down the pelvis near term.

Treatment

According to the American Academy of Orthopedic Surgeons (AAOS), sciatica can be relieved with the following options but check with your doctor first for safety during pregnancy:

The AAOS also advises against prolonged bedrest unless your doctor advises it.

Anemia

You may develop anemia if you have too few red blood cells or the red blood cells don't contain enough hemoglobin, which is the iron-rich protein that carries the oxygen from your lungs throughout your body. This is more likely to occur in the second and third trimesters.

Numbness or tingling in your arms and legs may be related to an iron deficiency. Another reason for numbness and tingling in hands and feet may also be attributed to pernicious anemia which is caused by a deficiency in Vitamin B12 that may even lead to nerve damage. Additional symptoms of anemia include:

  • Fatigue
  • Weakness
  • Headaches
  • Dizziness
  • Pale skin
  • Irregular heartbeat
  • Short of breath
  • Chest pain
  • Irritability
  • Cold hands and feet

Cause

The causes of anemia can vary and include:

  • You have a problem making red blood cells
  • Your red blood cells are dying faster than they are produced
  • Low iron levels
  • Low vitamin B12 levels
  • Loss of blood
  • Underlying disease such as kidney disease
  • Inherited blood diseases such as, aplastic anemia, sickle-cell anemia and thalassemia

Treatment

Pregnancy-induced anemia is fairly common. Treatment typically includes adjustments to your diet and nutritional intake. You will want to eat iron-rich foods such as red meat, dark green leafy vegetables, and beans. An iron supplement may be recommended as well.

Bell's Palsy

Bell's palsy usually affects one side of the face, causing numbness and tingling or burning of the affected side. This is accompanied by weakness or paralysis and drooping of those facial muscles and difficulty closing your eye. Symptoms usually resolve within weeks of appearance.

Cause

Bell's palsy is caused by an inflammation of the facial (7th) nerve. According to Johns Hopkins Medicine, Bell's palsy most commonly affects pregnant women or diabetics. It might be caused by an autoimmune reaction or a viral infection of the nerve. It is more common after a viral illness or in people with diabetes or high blood pressure.

Treatment

Until symptoms resolve, it is important to protect the affected eye with eye drops and an eye patch. Other treatment considerations include the following only as a doctor allows:

  • Steroids by mouth or injection
  • Application of moist heat to the face
  • An antiviral medicine
  • Pain medicine

Meralgia Paresthetica

Meralgia paresthetica refers to numbness, tingling and burning along the front outer side of your thigh, as reviewed by the American Association of Orthopedic Surgeons. The syndrome is more common in the third trimester of pregnancy. Unless there is damage to the nerve from trauma or other causes, symptoms are expected to improve after delivery.

Cause

Meralgia paresthetica is caused by compression of the lateral femoral cutaneous in the groin. According to the Mayo Clinic, pregnancy puts more pressure on your groin tissues as your belly grows. The nerve can also be affected by gaining a lot of weight or wearing tight clothing during pregnancy, or from inflammation.

In addition, compression of the nerve can also happen from prolonged pushing with your thighs flexed on your belly during a long second stage at delivery.

Treatment

With guidance from your doctor or midwife, management of your symptoms can include:

  • Taking pressure off your groin as much as possible including wearing looser clothing
  • Managing your pregnancy weight gain
  • Massage and ice or cold therapy to the affected areas
  • Pain medicine
  • Steroid injections

Diabetic Neuropathy

Women with a history of diabetes are at risk for symptoms of diabetic peripheral neuropathy (DPN). Symptoms include numbness, tingling and burning, especially in the legs, feet and hands. These symptoms may have been present before pregnancy and may become more noticeable during pregnancy. Fluid retention, especially in women with diabetic kidney disease, could make the numbness and tingling more pronounced.

Cause

Diabetes can cause damage and generalized dysfunction of peripheral nerves. Damage to small blood vessels and inflammation of nerve fibers because of high blood sugar may be involved, according to the Mayo Clinic. The longer you have diabetes, especially if not well-treated, the greater your risk for DPN.

Treatment

You can reduce your risk for DPN before pregnancy by keeping blood sugar under good control. Talk to your doctor about treatments that might be safe during pregnancy. According to the National Institute of Diabetes and Digestive and Kidney Disease, medicines that may relieve symptoms include:

  • Anti-depressants
  • Anti-seizure medicines
  • Opiate pain medicines
  • Creams or patches applied to the feet to relieve pain

Because of decreased sensation, continue to protect your hands and feet from trauma and extreme temperatures and follow proper diabetic foot care during your pregnancy.

Pregnant woman rubbing foot

Vitamin B12 Deficiency

Vitamin B12 is the most common B vitamin deficiency and can cause numbness and tingling in hands and feet during pregnancy. This is because vitamin B12 and other B vitamins are essentially for normal nerve growth and function.

Cause

Deficiency in vitamin B12 can occur if you don't eat any or enough animal foods and don't take a vitamin supplement during your pregnancy. Other common causes include prolonged vomiting, poor absorption of nutrients, autoimmune diseases such as pernicious anemia and other bowel diseases, according to the University of Chicago.

Treatment

Prevention and treatment of Vitamin B12 deficiency during pregnancy includes adding sources of the vitamin to your diet, such as red meat, fish and poultry or taking a prenatal vitamin that contains Vitamin B12. Severe deficiency may require B12 shots.

Electrolyte Imbalance

Electrolyte imbalances can cause numbness and tingling during pregnancy, especially around your mouth, fingers and toes. Causes can occur throughout pregnancy. Check with your doctor for correct management if you have any of the following problems which could lead to an electrolyte imbalance:

  • Recurrent vomiting which can cause sodium and potassium loss
  • Recurrent diarrhea which can primarily lead to potassium loss
  • Loss of fluids from dehydration
  • Low calcium from not enough dairy products in your diet
  • Diuretics for fluid retention or high blood pressure
  • Kidney disease from problems such as diabetes or high blood pressure
  • Hyperventilation triggered by anxiety

Don't hesitate to consult with your doctor especially if these conditions are accompanied by light-headedness and dizziness.

Pre-Pregnancy Evaluation

In general, it is helpful to assess your health, your medical history and your risk factors for neuropathy before you get pregnant. This will keep you aware of symptoms to watch out for and how to manage them. If you have numbness and tingling in your extremities, lower back pain, or any chronic disorders that might put you at risk for worsening peripheral nerve dysfunction during pregnancy, discuss your situation in detail with your doctor ahead of pregnancy.

9 Causes of Numbness and Tingling During Pregnancy