The third trimester, which lasts weeks 29 to 40, is when your baby continues to develop and prepare for delivery. Even though nausea is prevalent in the first few months of pregnancy, some women may still feel it in the last month or two.

It can be caused by hormonal changes, stress, or digestive issues, leading to nausea during the third trimester. Morning sickness-like symptoms can result from hormonal changes and sensitivity to smells.

Let us briefly discuss its causes and how to overcome the third trimester morning sickness.

Causes of Third-trimester Nausea

Nausea, often experienced in the first trimester, might return in the third trimester, causing unexpected discomfort. This may come as a surprise, but it is common for many pregnant women.

Some women may only experience mild nausea, while others may have severe vomiting that can make everyday activities much harder.

The causes include

• Hormonal changes – Shifts in hCG and estrogen can affect nausea control

• Increased sensitivity to smells – Strong smells may trigger nausea

• Stress and anxiety – Emotional stress can worsen nausea

• Dietary factors – Spicy or greasy foods may increase discomfort

• Gastrointestinal changes – Slower digestion and increased stomach acid

• Your changing body – Growing baby puts pressure on stomach and diaphragm

Related Symptoms of Third-trimester Nausea

Third-trimester nausea may also be accompanied by:

• Frequent vomiting

• Constipation

• Abdominal bloating or gas

• Heartburn or indigestion

• Loss of appetite

• Difficulty gaining weight

• Excessive saliva production

• Increased sweating

• Abdominal discomfort or pain

• Severe fatigue

• Persistent vomiting affecting daily activities

Remedies for Third-trimester Nausea

In most cases, nausea can be managed using methods similar to early pregnancy.

Eat small, frequent meals

Skipping meals can worsen nausea. Eat small, healthy meals throughout the day. Plain soup or dry toast can help in the morning.

Dietary modifications

• Avoid oily, spicy, or junk foods

• Eat light, frequent meals

• Focus on easily digestible foods

Avoid nausea-triggering foods

Common triggers include:

• Skipping meals

• Insufficient sleep

• Overcrowded rooms

• Strong smells (perfume, coffee, smoke, chemicals)

• Loud noise

• Movement (driving, flickering lights)

• Excessive exercise

Drink more water

Stay hydrated. Avoid caffeine, energy drinks, and sugary beverages.

Medications and Treatments

For moderate to severe nausea, doctors may recommend:

• Vitamin B6 supplements

• Antacids

• Anti-nausea medications

In severe cases, prescription medication or IV fluids may be needed to prevent dehydration.

Other remedies include

• Get additional rest

• Sip ginger tea or chew ginger candies

• Snack on carb-rich foods like idli, dosa, or poha

• Eat peppermint or lemon-flavored candies

• Take vitamin B6 with doctor approval

When Third Trimester Nausea Signals Labor

Nausea may occur as labor approaches, usually during active labor or transition. Signs of labor include:

• Back pain

• Amniotic fluid leaking

• Loss of mucus plug

• Lightening (baby drops lower)

• Diarrhoea

• Regular, strong contractions

When to See the Gynecologist

If vomiting is constant or severe, consult your doctor to ensure hydration and rule out complications.

Bottom Line

Nausea during the third trimester can be challenging, but understanding its causes and managing triggers can help you feel better and protect both mother and baby.

For expert pregnancy care, visit Sai Speciality Center, the best gynaecology hospital in Bangalore.