Some women feel chilly, shivery or can’t warm their hands and feet when their period starts. Here’s why it happens, what helps, how Chinese medicine has long described it, and when chills need a doctor.
Feeling cold during your period is common and usually harmless. As your period starts, progesterone falls and your body temperature drops slightly. Prostaglandins, the chemicals that cause cramps, can also bring chills and flu-like aches. Blood loss, low iron and poor sleep can add to it. Chills with a fever, a rash or feeling very unwell are different and need a doctor, especially if you use tampons.
Why you feel cold during your period
- Hormone changes. Progesterone raises body temperature slightly after ovulation. When it drops just before your period, your temperature falls with it, and some women notice the change.
- Prostaglandins. These chemicals make the uterus contract and can also cause chills, aches, headache and an upset stomach, sometimes called “period flu.”
- Low iron. Heavy periods can lower your iron over time, and iron-deficiency anemia often makes people feel cold and tired; see Blood Clots During Your Period and Tired During Your Period.
- Poor sleep and low energy, which make it harder to stay warm.
- Cold hands and feet can be ordinary, or linked to Raynaud’s (fingers turning white or blue in the cold) or low iron.
When feeling cold isn’t just your period
- You feel cold all month, not just around your period. An underactive thyroid, low iron or low body weight are worth checking.
- You have a fever of 100.4°F (38°C) or more, which points to an infection rather than your period.
- You’re tired, breathless or pale, which can be signs of anemia.
Get urgent care if you use tampons or a menstrual cup and have a sudden high fever, a sunburn-like rash, vomiting, diarrhea, dizziness or confusion. These can be signs of toxic shock syndrome, which is rare but serious. Remove the tampon and seek help straight away.
What helps you warm up
- Layers and warm socks, and a warm bath or shower.
- Heat on your lower belly or back, which also eases cramps; see Heating Pad for Cramps.
- Warm drinks, such as ginger tea; see Tea for Period Cramps.
- Warm, cooked meals, with iron-rich foods such as beans, lentils, leafy greens and red meat.
- Gentle movement, such as walking or stretching, to get blood flowing.
- Rest. Being tired makes you feel the cold more.
The traditional Chinese medicine view: cold in the uterus
Chinese medicine has described this pattern for centuries. Women who feel cold around their period, with cold hands and feet, cramps that ease with a hot water bottle, and dark blood or clots (see Dark Period Blood), are traditionally described as having cold in the uterus, sometimes called a “cold womb.” That’s why traditional advice includes keeping the lower belly and feet warm and avoiding iced drinks during your period. This is a traditional framework, not an established medical mechanism.
A heating pad eases pain while you use it, so many women reach for one every period. Chinese medicine asks a different question: why does the pattern keep coming back? It treats cold in the uterus as a whole-body pattern rather than a monthly symptom.
The CycleCalm herbal pouch follows that tradition. It’s worn over the navel through the month as a 30-day course, rather than only on painful days. In my practice notes, one woman had severe period pain for 20 years, often in bed for up to three days each month. After one course, she reported no pain at her next period. That is one person’s experience, not a typical or expected result, and there is no CycleCalm-specific research on how often or how long changes last. CycleCalm isn’t a treatment for anemia, thyroid problems, infection or any other medical cause of feeling cold.
Quick answers
Why am I feeling cold during my period?
Mostly the drop in progesterone and the release of prostaglandins at the start of your period. Low iron from heavy periods can add to it.
Are period chills normal?
Mild chills without a fever are common. Chills with a fever, rash or vomiting need a doctor, urgently if you use tampons.
Why are my hands and feet cold during my period?
Hormone shifts and blood loss can play a part. If they’re cold all month or turn white or blue, mention it to your doctor.
What is a cold womb?
A Traditional Chinese Medicine term for a pattern of period cramps that ease with warmth, often with cold hands and feet and dark blood. It isn’t a medical diagnosis.
Reviewed October 2026. Author: Qingcai Wang, MD, PhD, developer of the Five Essences external herbal-pouch formulations, with a commercial interest in their sale. General education only; continue your medical care.
Sources: ACOG, Dysmenorrhea: painful periods; NHS, Heavy periods; NHS, Toxic shock syndrome.