Ever found yourself shivering under a blanket one moment and tossing it off the next, all while you're on your period? You are not alone.

Many women report experiencing chills or hot flashes during their menstrual cycle, and while it might seem unusual, it's more common than you would think. Your body is working overtime during your period, and those temperature swings? They are a real part of the process.

What's happening in your body during your period?

Your period is not just about bleeding; it is a full-body hormonal rollercoaster.

Each month, your body cycles through rising and falling levels of estrogen and progesterone. These hormones do not just affect your uterus; they also impact your brain, mood, energy levels, and yes, even your internal thermostat.

Why do chills or hot flashes happen?

1. Hormonal fluctuations

Estrogen plays a key role in regulating your body temperature. Right before your period, estrogen levels drop, and for some women, this can trigger temporary hot flashes or chills, much like mini menopause symptoms.

Think of it like this: Your body is adjusting to a hormonal shift, and the thermostat gets confused for a bit.

2. Prostaglandins at work

Your body releases prostaglandins, natural chemicals that help the uterus contract and shed its lining. They also affect the hypothalamus, the part of your brain that controls temperature. This can lead to fever-like sensations or sudden chills.

3. Immune response

Some women experience a slight rise in core body temperature during menstruation, similar to what happens when you’re fighting a virus. This mild immune activation can make you feel warm and flushed or give you the chills.

4. Low iron levels

If you have heavy periods, you might lose enough blood to feel fatigued, dizzy, or even cold. This could be a sign of low iron levels (anemia), which commonly causes chills, weakness, and temperature sensitivity.

5. Increased sensitivity

If you are already feeling tired, bloated, or emotionally drained, your body may be more sensitive to temperature changes. What feels like a normal room to others might feel like an icebox or a sauna to you.

It's easy to dismiss these symptoms, after all, they're not always talked about in the usual "period 101" chats. But if you’ve felt your teeth chatter or your skin sweat for no obvious reason during your period, you’re experiencing a very real physiological response.

What can you do to feel better

Here are some ways to stay comfortable and supported during those temperature swings:

Layer up: Wear breathable layers so you can adjust your clothing quickly when chills or hot flashes hit.

Stay hydrated: Water helps regulate your body temp and reduces bloating, too.

Track your cycle: Use a period app or journal to spot patterns. Knowing when symptoms occur can help you prepare.

Eat iron-rich foods: Think spinach, lentils, tofu, red meat, or fortified cereals, especially if your periods are heavy.

See a doctor if it is frequent: If chills or hot flashes happen every month or feel extreme, it is worth discussing with your gynecologist. You might be dealing with hormonal imbalances, perimenopause (yes, even in your 30s!), or anemia.

Feeling like your body is turning hot and cold during your period is not just weird; it is a sign of how complex and powerful your hormonal system is.