Phlegm in the Throat During Pregnancy: Causes and Concerns - Obstetrics and Gynecology

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Phlegm in the throat?


Hello, Doctor.
I am currently 19 weeks pregnant.
Since I became pregnant, I have noticed that I have phlegm in my throat every morning, and its color is close to dark red.
I also have phlegm when I wake up at night to use the bathroom, but its color is lighter.
Could you please explain why this is happening?

Xiao Xue, 20~29 year old female. Ask Date: 2002/12/24

Dr. Chen Fuhao reply Obstetrics and Gynecology


Hello, Xiaoxue: Based on your statement, although you are 19 weeks pregnant, I still recommend that you seek an appointment with a pulmonologist as soon as possible.
Thank you.
Wishing you good health.

Reply Date: 2002/12/24

More Info


During pregnancy, many women experience various physiological changes, and the presence of phlegm in the throat can be one of them. At 19 weeks pregnant, it is essential to understand the potential causes and implications of this symptom.

Firstly, hormonal changes during pregnancy can lead to increased mucus production. The body undergoes significant hormonal fluctuations, particularly with elevated levels of progesterone and estrogen. These hormones can stimulate the mucous membranes, leading to increased mucus secretion, which may manifest as phlegm in the throat. This is often more pronounced in the morning due to the accumulation of mucus overnight while sleeping.

Additionally, pregnancy can lead to changes in the immune system, making some women more susceptible to respiratory infections or allergies, which can also contribute to increased mucus production. If you have a history of allergies or respiratory issues, these conditions may be exacerbated during pregnancy, leading to more noticeable phlegm.

The color of the phlegm can also provide insight into its cause. Dark red or brown phlegm may indicate the presence of blood, which could be due to several factors, including irritation of the throat or nasal passages, or even minor bleeding from the capillaries in the respiratory tract. This can occur due to increased blood flow and vascularity during pregnancy. However, if the phlegm is consistently dark red or accompanied by other symptoms such as coughing, wheezing, or difficulty breathing, it is crucial to consult a healthcare provider to rule out any serious conditions.

Another potential cause of phlegm in the throat during pregnancy is gastroesophageal reflux disease (GERD). The growing uterus can exert pressure on the stomach, leading to acid reflux, which can cause irritation in the throat and increased mucus production. If you notice that your symptoms worsen after eating or when lying down, this could be a contributing factor.

To manage this symptom, consider the following recommendations:
1. Stay Hydrated: Drinking plenty of fluids can help thin the mucus, making it easier to expel and reducing the sensation of phlegm in the throat.

2. Humidify the Air: Using a humidifier in your home can help keep the air moist, which may alleviate throat irritation and reduce mucus production.

3. Avoid Irritants: Stay away from smoke, strong odors, and allergens that may exacerbate your symptoms.

4. Consult Your Healthcare Provider: If the phlegm persists, changes in color, or is accompanied by other concerning symptoms, it is essential to discuss this with your obstetrician or a healthcare provider. They can evaluate your condition and determine if any further investigation or treatment is necessary.

In summary, while the presence of phlegm in the throat during pregnancy can be a common occurrence due to hormonal changes and increased mucus production, it is essential to monitor the symptoms closely. If there are any changes in color, consistency, or if you experience additional symptoms, seeking medical advice is crucial to ensure both your health and that of your developing baby.

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