Period Flu — Why You Feel Ill Before Your Period
By Dr (TCM) Attilio D'Alberto | Traditional Chinese Medicine Practitioner, Wokingham
Period flu is not a medical diagnosis — but for many women it describes a very real cluster of symptoms that arrive in the days before menstruation. These include fatigue, body aches, headache, nausea, chills, and a general feeling of malaise that closely resembles the early stages of a viral illness. Understanding why this happens — and how TCM addresses it — can make a significant difference to quality of life in the premenstrual phase.
Why Does Period Flu Happen?
The symptoms of period flu are driven primarily by prostaglandins — hormone-like compounds produced by the uterine lining that stimulate contractions to help shed the endometrium. Prostaglandins do not stay confined to the uterus; they can enter the bloodstream and trigger systemic effects including muscle aches, headache, nausea, diarrhoea, and fatigue — much like a mild inflammatory response. Women who produce higher levels of prostaglandins tend to experience more severe symptoms.
The hormonal shift in the late luteal phase — specifically the rapid drop in progesterone and oestrogen — also plays a role. This decline triggers an inflammatory cascade and affects neurotransmitter levels, particularly serotonin, which contributes to mood changes, low energy, and heightened pain sensitivity.
Immune System Changes Across the Cycle
Research has shown that immune function fluctuates across the menstrual cycle. In the premenstrual phase, pro-inflammatory cytokines increase as the body prepares to shed the uterine lining. This shift in immune activity may partly explain why some women feel particularly unwell — and why existing conditions such as asthma, migraines, and autoimmune disorders often flare premenstrually.
The TCM View
In traditional Chinese medicine, the premenstrual phase is the time of greatest liver qi activity as the body prepares to release menstrual blood. If the liver qi is stagnant — a pattern associated with chronic stress, frustration, or irregular lifestyle — the qi and blood become congested in the lower burner before the period, producing a range of systemic symptoms including heat, pain, nausea, and body aches. This pattern is compounded when there is underlying blood deficiency, which leaves insufficient nourishment to support the liver's smooth regulation of qi in the premenstrual phase.
The chills and flu-like aching some women experience can also reflect a pattern where wei qi (defensive energy) is weakened by the relative deficiency of the premenstrual phase, leaving the body more vulnerable to pathogenic influences at this time.
Treatment with Acupuncture and Chinese Herbs
Acupuncture is highly effective at regulating liver qi and reducing the prostaglandin-driven inflammation that underlies period flu. Treatment in the mid-luteal phase — approximately five to seven days before the expected period — is particularly well-timed to prevent the build-up of stagnation that causes symptoms. For women whose symptoms are severe, I often recommend fortnightly acupuncture — once in the follicular phase and once in the luteal phase — to maintain a more balanced pattern across the full cycle.
Chinese herbal medicine can complement acupuncture in this context. Formulas that soothe the liver, nourish blood, and reduce inflammatory prostaglandins — including variations of Xiao Yao San and Dang Gui Shao Yao San — are among those I use most frequently for premenstrual symptoms. A bespoke prescription based on your specific pattern is always more effective than a generic approach.
Dietary Support
Reducing inflammatory foods in the ten days before your period can help — this includes alcohol, refined sugar, and excess caffeine. Increasing omega-3-rich foods (oily fish, flaxseed) provides anti-inflammatory prostaglandin precursors that partially counterbalance the pro-inflammatory ones. Magnesium — found in dark chocolate, nuts, and leafy greens — is also well supported by research for reducing menstrual pain and premenstrual symptoms.
If premenstrual symptoms are significantly affecting your quality of life, get in touch or book a consultation at my Wokingham clinic.
