The “Pregnancy Cold”: Is It Hormones or Pregnancy Rhinitis?

You are 20 weeks pregnant, you have not been near anyone with a cold, and yet your nose has been stuffy for weeks. You wake up congested, spend the day mouth-breathing, and wonder whether this never-ending blocked nose is normal or whether something else is going on. Welcome to pregnancy rhinitis — one of the most common but least-discussed symptoms of pregnancy.

A blocked nose in pregnancy affects an estimated 20–40% of pregnant women at some point during their pregnancy, according to published obstetric and ENT literature. Despite being common, it is frequently mistaken for a lingering cold, dismissed as “just one of those things,” or confused with hay fever. Understanding the difference matters — because the causes, management approaches, and safety considerations during pregnancy are all different.

This article explains what pregnancy rhinitis is, how it differs from allergic rhinitis and viral infections, what relief measures are considered safe during pregnancy, and when allergy blood testing may help clarify the picture. It draws on NHS guidance, the UK Specialist Pharmacy Service (SPS), the UK Teratology Information Service (UKTIS), Allergy UK resources, and the published rhinology and obstetric literature. This is general health information — it is not a diagnosis and does not replace advice from your midwife, GP, or maternity team.

Quick Answers

• Key differences: Pregnancy rhinitis causes congestion without itchy eyes, sneezing fits, or fever. A cold usually resolves within 7–10 days and may include a sore throat and fever. Hay fever typically involves itching, sneezing, and watery eyes with a seasonal or trigger-related pattern.
• Safe measures: Saline nasal rinses, steam inhalation, humidifiers, sleeping with the head elevated, and avoiding strong irritants (perfumes, cigarette smoke). Always check with your midwife or pharmacist before using any medicated spray or tablet.
• Red flags: High fever, severe headache with visual changes, facial swelling beyond nasal congestion, difficulty breathing or wheezing, reduced fetal movements — seek urgent medical attention.

What Is Pregnancy Rhinitis?

Pregnancy rhinitis is defined as nasal congestion lasting six or more weeks during pregnancy, without other signs of respiratory infection or an identifiable allergic cause, and which resolves completely within two weeks of delivery (Ellegård & Karlsson, 1999). It is a distinct condition from allergic rhinitis, sinusitis, and the common cold — though it can be difficult to distinguish without careful history-taking.

Why Does It Happen?

Several pregnancy-related physiological changes contribute to nasal congestion:

• Increased blood volume: Total blood volume increases by up to 50% during pregnancy. This expanded circulatory volume affects the extensive network of blood vessels in the nasal mucosa, causing them to swell and narrow the nasal passages.
• Hormonal effects: Rising oestrogen levels promote vasodilation (widening of blood vessels) and increased mucous gland activity throughout the body — including in the nose. Progesterone may also contribute to smooth muscle relaxation in the nasal vasculature.
• Fluid retention: The generalised fluid retention of pregnancy can contribute to oedema (swelling) of the nasal mucous membranes.
• Increased mucus production: Hormonal stimulation of goblet cells in the nasal lining increases mucus production, contributing to a pregnancy runny nose or postnasal drip.

When Does It Typically Start?

Pregnancy rhinitis most commonly develops during the second trimester (around weeks 13–28) and may persist or worsen into the third trimester. Some women notice symptoms from the first trimester, while others are affected only in the final weeks. The onset does not follow a seasonal or environmental trigger pattern — it tracks with the progressive hormonal changes of pregnancy.

How Long Does It Last?

By definition, pregnancy rhinitis resolves within two weeks of delivery as hormone levels return to their pre-pregnancy state. Most women notice significant improvement within the first few days postpartum. If nasal congestion persists beyond two to three weeks after birth, other diagnoses — including allergic or non-allergic rhinitis — should be considered.

Pregnancy Rhinitis vs Hay Fever vs a Cold

Understanding pregnancy congestion vs cold — and vs allergy — is important because the management approach differs for each. The following comparison can help, though symptoms often overlap and a definitive distinction may require clinical assessment.

It is also possible to have more than one condition simultaneously. A woman with pre-existing allergic rhinitis pregnancy may find that hormonal rhinitis makes her baseline nasal congestion significantly worse. In this scenario, identifying and managing the allergic component — with appropriate allergen avoidance and, if needed, pregnancy-safe medication — can help reduce the overall burden of symptoms even if the hormonal element remains.

Safe, Practical Relief Options

Managing a blocked nose in pregnancy requires extra caution, because not all over-the-counter products are suitable during pregnancy. The following measures are generally considered safe and are consistent with NHS and SPS guidance — but always check with your midwife, GP, or pharmacist before starting any new treatment during pregnancy.

Saline Nasal Rinses and Sprays

Isotonic or hypertonic saline nasal rinses (using a squeeze bottle, neti pot, or saline spray) are drug-free and safe throughout pregnancy. They help clear mucus, reduce swelling, and flush irritants from the nasal passages. Regular use — particularly morning and evening — can provide meaningful symptom relief. The NHS recommends saline rinses as a first-line approach for nasal congestion.

Steam Inhalation and Humidification

• Breathing in steam from a bowl of hot water (with a towel over your head) can temporarily ease congestion. Take care to avoid burns.
• A cool-mist humidifier in the bedroom can help keep nasal passages moist overnight, particularly in centrally heated homes where the air is dry.

Sleeping Position

• Elevating the head of the bed with an extra pillow or a wedge pillow can reduce nasal blood pooling and improve breathing comfort at night. This also aligns with general pregnancy comfort advice for the later trimesters.
• Sleeping on your side (as recommended from the third trimester onwards for other pregnancy-related reasons) may also help with nasal airflow compared to lying flat on your back.

Avoiding Irritants

• Strong perfumes, cleaning product fumes, cigarette smoke, and air pollution can all worsen nasal inflammation — avoid where possible.
• If you are sensitised to dust mites or pet dander, reducing exposure in the bedroom (allergen-proof mattress covers, keeping pets out of the bedroom) may help reduce the allergic component of your symptoms.

Medication: What to Discuss With Your Maternity Team

The topic of safe nasal sprays pregnancy is understandably a priority for many women. The following is general information — all medication decisions during pregnancy should be made in discussion with your GP, midwife, or pharmacist.

• Saline sprays: Safe throughout pregnancy. No medication content.
• Corticosteroid nasal sprays: Budesonide nasal spray has the most reassuring safety data in pregnancy, according to the UK Specialist Pharmacy Service (SPS) and the UKTIS. Other intranasal corticosteroids (fluticasone, mometasone) are also widely used, but budesonide is typically preferred where a choice exists. Your GP or midwife can advise.
• Decongestant nasal sprays (oxymetazoline, xylometazoline): Not generally recommended during pregnancy, particularly in the first trimester. They can also cause rebound congestion (rhinitis medicamentosa) if used for more than 5–7 days. Discuss with your prescriber if you are considering short-term use.
• Oral decongestants (pseudoephedrine, phenylephrine): The NHS advises against routine use of oral decongestants during pregnancy. Discuss alternatives with your pharmacist.
• Antihistamines: If allergic rhinitis pregnancy is suspected or confirmed, cetirizine and loratadine are generally considered appropriate options (SPS/UKTIS guidance), particularly from the second trimester. Chlorphenamine has a longer track record in pregnancy but causes drowsiness. Always discuss with your pharmacist or GP before taking antihistamines during pregnancy.

When Allergy Testing May Help

Pregnancy rhinitis itself does not require allergy testing — it is a hormonal condition that resolves after delivery. However, there are situations where an IgE blood test may be genuinely useful:

• Pre-existing nasal symptoms: If you had a blocked or runny nose, sneezing, or itchy eyes before becoming pregnant, there may be an underlying allergic rhinitis that is now being amplified by pregnancy-related congestion. Identifying the specific triggers (pollens, dust mites, pet dander, moulds) through testing can help you target avoidance measures.
• Clear seasonal or trigger-related pattern: If your symptoms are noticeably worse during pollen season, after being around animals, or in dusty environments, an allergic component is likely — and knowing which allergens are involved helps with planning.
• Co-existing eczema or asthma: The “atopic triad” (eczema, asthma, and allergic rhinitis) is common. If you have eczema or asthma that has changed during pregnancy, understanding your full allergic profile may support broader management discussions with your GP or specialist.
• Planning for future pregnancies: If nasal symptoms were a significant burden during this pregnancy and you are planning to conceive again, identifying and pre-emptively managing allergic triggers before the next pregnancy can help reduce the overall symptom load.

What Testing Can and Cannot Show

The blood draw itself is a standard venous sample — the same type of procedure you will already have had during routine antenatal blood tests. It does not require you to stop any medication, and it does not involve allergen exposure.

Myth vs Fact

The Impact on Sleep and Daily Life

One of the most significant consequences of pregnancy rhinitis is its effect on sleep quality. Nasal congestion forces mouth breathing, which can cause a dry mouth, sore throat on waking, and snoring and fragmented sleep. Given that sleep is already frequently disrupted during pregnancy (by the growing bump, frequent urination, and general discomfort), adding persistent nasal congestion to the mix can leave women feeling exhausted.

Research has also linked pregnancy rhinitis to snoring, and there is growing interest in the relationship between pregnancy-related nasal congestion and pregnancy-associated sleep-disordered breathing. While this is an evolving area of research, it highlights that pregnancy rhinitis is not trivial and that seeking relief is entirely reasonable.

Beyond sleep, persistent congestion can affect appetite (food tastes bland when the nose is blocked), reduce enjoyment of daily activities, and contribute to the general fatigue and low mood that some women experience during pregnancy. Taking active steps to manage symptoms — even if they cannot be completely eliminated — can make a real difference to quality of life.

Frequently Asked Questions

Can pregnancy rhinitis harm my baby?

Pregnancy rhinitis itself is not considered harmful to the baby. However, severe nasal congestion can disrupt sleep, reduce appetite, and contribute to fatigue. In some cases, chronic mouth breathing and poor sleep quality have been associated with snoring and sleep-disordered breathing in pregnancy, which your midwife or GP may want to monitor. If your symptoms are significantly affecting your quality of life or sleep, discuss management options with your maternity team.

Does pregnancy rhinitis go away after birth?

Yes. Pregnancy rhinitis is directly linked to the hormonal and vascular changes of pregnancy. In the vast majority of cases, symptoms resolve within two weeks of delivery — often within days. If nasal congestion persists beyond two to three weeks after birth, other causes should be considered, including allergic rhinitis or non-allergic rhinitis, and you should speak to your GP.

Can I use nasal sprays during pregnancy?

Saline nasal sprays and rinses are considered safe throughout pregnancy and are recommended as a first-line measure. Some corticosteroid nasal sprays — particularly budesonide — have a relatively well-established safety profile in pregnancy and may be recommended by your GP or midwife if saline alone is insufficient. Always check with your pharmacist, GP, or midwife before using any medicated nasal spray. Decongestant nasal sprays (such as oxymetazoline or xylometazoline) should be avoided unless specifically advised by a prescriber.

Are antihistamines safe to take during pregnancy?

Some antihistamines have a well-established safety profile in pregnancy. The SPS and UKTIS generally consider cetirizine and loratadine to be appropriate choices if an antihistamine is needed, particularly in the second and third trimesters. Chlorphenamine has a longer history of use in pregnancy but causes drowsiness. Always discuss antihistamine use with your GP, midwife, or pharmacist — do not self-prescribe during pregnancy.

Can pregnancy cause new allergies to develop?

Pregnancy involves significant immune system changes that can alter how your body responds to allergens. Some women report new allergic symptoms during pregnancy, while others find that pre-existing allergies improve or worsen. True new sensitisation can occur at any point in life, including during pregnancy. However, many pregnancy-related nasal symptoms are due to hormonal rhinitis rather than new allergy. If you are unsure whether your symptoms are allergic, an IgE blood test can help clarify the picture.

Should I avoid allergy blood testing during pregnancy?

There is no medical reason to avoid a specific IgE blood test during pregnancy. The test involves a standard venous blood draw — the same type of procedure used in routine antenatal care. It does not require you to stop any medication and does not involve allergen exposure. However, pregnancy-related immune changes could theoretically influence IgE levels, so results should always be interpreted in clinical context by your GP or allergist.

Considering Allergy Testing?

Pregnancy rhinitis is a common and manageable condition — but if your nasal symptoms have a pattern that suggests an allergic component (itchy eyes, sneezing, seasonal worsening, or symptoms that pre-date your pregnancy), identifying your specific triggers through an IgE blood test can help you and your maternity team make better-informed management decisions.

At Allergy Clinic, we offer nurse-led venepuncture and laboratory-analysed specific IgE testing, including aeroallergen panels covering grass, birch, and weed pollens, house dust mites, pet dander, and common moulds. The blood draw is the same straightforward venous sample you are already familiar with from antenatal care. Our service provides a diagnostic blood sample and a detailed laboratory report. We do not provide GP consultations or prescribing as part of this pathway — we recommend sharing your results with your midwife, GP, or allergy specialist for clinical interpretation and personalised guidance on pregnancy-safe management options.

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Sources

• NHS — Allergic rhinitis, Hay fever, Pregnancy common problems. Available at: nhs.uk/conditions/allergic-rhinitis
• NHS Specialist Pharmacy Service (SPS) — Medicines in pregnancy guidance. Available at: sps.nhs.uk
• UK Teratology Information Service (UKTIS) — Bumps: Best Use of Medicines in Pregnancy. Available at: medicinesinpregnancy.org
• Allergy UK — Rhinitis factsheets and patient guidance. Available at: allergyuk.org
• NICE — Clinical Knowledge Summary: Allergic rhinitis. Available at: cks.nice.org.uk
• Ellegård, E.K. & Karlsson, N.G. (1999). Nasal congestion during pregnancy. Clinical Otolaryngology, 24(4), 307–311.
• Ellegård, E.K. (2003). Pregnancy rhinitis. Immunology and Allergy Clinics of North America, 26(2), 283–290.
• Caparroz, F.A. et al. (2015). Rhinitis and pregnancy: literature review. Brazilian Journal of Otorhinolaryngology, 81(1), 81–86.
• Anaphylaxis Campaign — Recognising and managing severe allergic reactions. Available at: anaphylaxis.org.uk