Third Trimester Sickness What to expect

Sarah Johnson
7 Min Read

You may think that morning sickness will be over at the end of the first trimester; then why are you facing the third-trimester sickness? The annoying pregnancy symptoms generally let up after the first week of pregnancy, but for some, it will stick around or get back in the last trimester.

Here in this article, we will share some of the causes and remedies of third-trimester sickness. So, if you are pregnant and facing third trimester sickness returns during your third trimester, you must check out this guide carefully.

Sickness in Third Trimester Symptoms

During the last weeks of pregnancy, your first and second-trimester symptoms will be replaced by others. Every person is different, and the common symptoms of the third trimester generally include the following:

  • Heartburn
  • Shortness of breath
  • Swelling
  • Tender breasts
  • Hemorrhoids
  • Sleeping problems
  • Signs of baby dropping

We mainly refer to sickness and vomiting as the symptoms of the first trimester of pregnancy when the morning sickness worsens. It happens at any time during the pregnancy and is expected in the third trimester. As per a study, nearly 165 women face sickness in the third trimester, and approximately. 7% are facing vomiting.

What Causes Third-Trimester Sickness?

In the first trimester, sickness and vomiting are common, and the change in hermes causes it. The pregnancy third trimester sickness has a different set of causes.

Gas and Bloating

Gas and bloating are quite common during the pregnancy. When your body produces progesterone, it relaxes and slows down the muscles involved in digestion. It also causes several digestion issues, such as gas and bloating. In several cases, gas may lead to sickness and other stomach issues. If you think that your gas causes third-trimester sickness, you have to contact your doctor. It is perfect for getting a proper checkup as it may be a sign of a big issue like gastritis.


Another issue related to digestion that will cause the third trimester morning sickness is constipation. When you get constipated, your stool usually becomes tough to push out. It mainly causes a backup and stops the new food in your stomach from moving through the intestine. When the food stays in your stomach longer, it causes bloating and nausea. There is also a different reason why third-trimester nausea will be connected to constipation. When the stool stays in the colon for a long time, it will change the gut bacteria and produce methane, which will cause nausea.

Acid Reflux

Most people will think of acid reflux symptoms, and heartburn comes to your mind. It will cause nausea, and during pregnancy, acid reflux is quite common. Changing the hormones is responsible, or it might be possible that your baby has been growing and pressing against the stomach. It only happens during the third trimester, and as your baby gets bigger and bigger, she changes her position and adds more pressure.


Your third-trimester nausea can be related to your diet if you are experiencing new food dislikes and sensitivity during your pregnancy. Some people feel sick after eating a particular food, and common triggers mainly included are:

  • Spicy
  • Greasy
  • Acidic


When adults get the flu, they often experience cold-like symptoms, such as a runny nose rather than stomach issues. It is also possible that your nausea may caused by a viral illness such as the flu. During pregnancy, you are highly susceptible to influenza, and it causes severe symptoms. All thanks to the changes in the immune system and the changes in your lungs while you are expecting them. If your third-trimester nausea occurs due to the flu, monitor your temperature. Some of them are associated with neural tube defects.

third trimester

Food Poisoning

Third-trimester sickness is also caused by the other type of sickness known as food poisoning. Food poisoning symptoms depend upon the person but generally include nausea and vomiting. Pregnant people are advised to avoid foods like cold-cut meals and pate.

Final Verdict

Sickness is quite common in the first trimester when the hormones change rapidly. Some people experience third-trimester nausea as well. Also, hormones may be something to blame, and many other potential causes exist. The reasons for the third-trimester sickness will generally include digestive issues, acid, reflux, diet, illness, and reactions to the prenatal vitamins. Also, nausea can be a symptom of severe matters like preeclampsia and liver problems.


Why am I not feeling well in my third trimester?

Hyperemesis mainly persists into the third trimester. Your growing baby will put extra pressure on your internal organs, which can cause your body to change and even cause nausea and vomiting. You’ll feel excessive vomiting if your uterus is pressed against your diaphragm or stomach

Is it normal to feel sick again in 3rd trimester?

Morning sickness mainly persists into the third trimester in 15% to 20% of the women and until delivery in approx—5% of women.

What pains are regular in 3rd trimester?

Swelling ankles, trouble sleeping, back pain, and having to go to pee every 20 minutes are the possibilities as you move into the homestretch of pregnancy. The patients often ask about how to make their third trimester comfortable.

How many weeks in 9 months of pregnancy?

You will become nine months pregnant at the end of the 36 weeks. Your baby will undergo some final development, like skin smoothing and growing out the nails.

Can third-trimester nausea be a sign of labor?

While unexpected and continuous nausea during the third trimester will signal premature labor, nausea alone is not an exact marker of labor.

Is nausea in the third trimester usual?

Nausea in the third trimester is not usual. It doesn’t happen because of an underlying pathology. Nausea into the third trimester doesn’t indicate any harm to the mother or fetus either. Still, communication with the professional is required so that they can handle the condition better.

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Sarah Johnson, loves helping expecting parents on their journey to parenthood, Sarah has lots of knowledge about her work as a maternity and fertility specialist. She provides personalized care and support to individuals and couples in the path of conception and pregnancy. She writes engaging blogs and articles at about maternity and fertility. From tips for boosting fertility to handling the ups and downs of pregnancy, her blogs are full of valuable information for women.
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