Feeling Hot in Early Pregnancy

Feeling unusually warm is a common early pregnancy symptom. Rising progesterone raises your core body temperature slightly, and increased blood flow adds to the sensation. For many it is one of the first hints before a positive test.

Why You Feel Hot in Pregnancy
How to Stay Comfortable
When Feeling Hot Is a Warning Sign
FAQ

Why You Feel Hot in Pregnancy

Progesterone raises the body's baseline temperature after ovulation, and it stays elevated in pregnancy. Increased blood volume and a faster metabolism also generate more heat. Blood vessels near the skin dilate, which is why you may feel flushed and warm even when the room is cool.

This is entirely normal and part of how your body supports a growing pregnancy. The raised basal body temperature that many people track when trying to conceive is the same mechanism — it simply continues rather than dropping when your period would have been due. That sustained warmth can itself be an early clue before a positive test.

Your blood volume increases substantially during pregnancy, beginning in the first trimester. As your heart pumps more blood to supply the placenta and baby, your skin blood vessels widen to help regulate heat. The result is that warm, sometimes flushed feeling — and it can be more noticeable at night when you are still and the body's heat has nowhere to go.

Hot flushes during pregnancy are also common and feel similar to the flushes associated with the menopause. They tend to come on suddenly and can leave you feeling sweaty or clammy before passing. While uncomfortable, they are not a sign that anything is wrong.

How to Stay Comfortable

You cannot stop pregnancy hormones, but there is plenty you can do to manage the discomfort:

Dress in layers using loose, breathable fabrics such as cotton or bamboo. You can easily remove a layer when you overheat.
Stay well hydrated. Drinking enough water throughout the day helps your body regulate its temperature. Aim for around six to eight glasses daily.
Keep your bedroom cool at night. A fan, open window, or light duvet can make a significant difference to sleep quality when you feel persistently warm.
Take cool showers or baths. A lukewarm shower before bed can lower your skin temperature and make it easier to settle.
Avoid hot environments. Very hot baths, saunas, steam rooms, and hot tubs should be avoided in pregnancy, particularly in the first trimester. Raising your core temperature significantly is not recommended.
Eat smaller meals. Digestion generates heat, so smaller, more frequent meals can reduce post-meal warmth.
Rest when you need to. Fatigue and feeling hot often go hand in hand in early pregnancy. Your body is doing an enormous amount of work, and rest is not laziness — it is necessary.

If you work in a warm environment, speak to your employer about adjustments. In the UK, pregnant workers have the right to a suitable working environment and to rest breaks, and your employer should carry out a risk assessment.

When Feeling Hot Is a Warning Sign

Feeling warm due to pregnancy hormones is different from having a fever. A true raised temperature — above 38°C (100.4°F) — in early pregnancy should always be assessed by a doctor.

A genuine fever may be a sign of infection, which can sometimes need treatment during pregnancy. Contact your GP or call 111 if you:

Have a temperature above 38°C
Feel shivery, unwell, or flu-like alongside feeling hot
Have pain when urinating (which could indicate a urinary tract infection)
Have any redness, swelling, or discharge that concerns you

If you feel faint, are vomiting repeatedly, or have severe abdominal pain alongside a high temperature, seek urgent help by calling 999 or going to your nearest A&E.

Frequently Asked Questions

### Is feeling hot a sign of pregnancy?

It can be. A sustained raised temperature after ovulation is linked to progesterone in early pregnancy. But a missed period and a positive test are more reliable indicators. Many people notice feeling warmer than usual before they have taken a test, and in hindsight recognise it as one of their first symptoms.

Does fever harm the baby?

A true fever above 38°C in early pregnancy may carry some risks, so always report a fever to your GP or midwife rather than managing it at home alone. Paracetamol is generally considered safe in pregnancy to bring down a fever — check with your pharmacist or GP for the correct dose. Simply feeling warm without a measurable fever is normal and is not the same as having a fever.

When does feeling hot stop?

Some people feel warm throughout pregnancy. It often eases a little in the second trimester as the body adjusts to its new hormonal baseline, though many find the third trimester brings warmth back as the growing baby adds to the body's heat output. Night sweats and hot flushes can continue right through to birth for some people.

Always speak to your midwife or GP if you have concerns about how you are feeling during pregnancy — they are there to help.

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