When Hormones and Chronic Illness Collide
Living with chronic illness forces you to read your body’s own language.
As you try to learn its signals, its patterns, and the difference between a bad day and the beginning of a crash…
There’s an extra twirl to the dizziness.
An extra churn in your stomach.
Pain feels like it suddenly develops an evil twin.
And then the fatigue… so horrendous it leaves you lying in bed staring at the wall because even watching tv is too exhausting.
The one consistency with chronic illness is the crash I get every month before my period.
The two illnesses that seem to be affected the most are my adrenal insufficiency and POTS. It’s another part of managing chronic illness that many healthcare professionals don’t warn you about.
POTS and Your Menstrual Cycle
For someone living with POTS (Postural Orthostatic Tachycardia Syndrome), the menstrual cycle can trigger significant symptom flares.
Hormonal shifts affect multiple systems in the body, including blood volume, circulation, temperature regulation, and inflammation.
Estrogen and progesterone fluctuate throughout the menstrual cycle before both drop right before menstruation.
Estrogen helps regulate blood volume and vascular tone. When estrogen drops, blood vessels can dilate more easily and blood volume may decrease. This can worsen blood pooling and increase orthostatic intolerance — already core symptoms of POTS.
Progesterone also plays a role in fluid balance and sodium retention. When progesterone levels change, dehydration symptoms can worsen and circulation can become more unstable.
When menstruation begins, the body releases prostaglandins, inflammatory compounds that help shed the uterine lining.
Prostaglandins:
Trigger uterine contractions
Increase inflammation
Affect blood vessels
Influence the autonomic nervous system
For someone already dealing with autonomic dysfunction, these changes can amplify symptoms significantly.
Even the blood loss that occurs during menstruation can temporarily reduce circulating blood volume, which can worsen dizziness, fatigue, and fainting episodes in people with POTS.
Adrenal Insufficiency and Your Menstrual Cycle
The menstrual cycle is also a physiological stress event for the body.
It involves:
uterine contractions
tissue breakdown and repair
inflammatory signaling
increased metabolic demand
These processes increase the body’s need for cortisol.
A healthy body can respond to this demand by producing more cortisol to regulate inflammation and stress responses.
But someone with adrenal insufficiency cannot produce sufficient cortisol.
That means the body is forced to handle the inflammatory and metabolic stress of menstruation without the hormone that normally helps regulate it.
The prostaglandins released during menstruation can cause cramps, migraines, nausea, fatigue, and gastrointestinal symptoms.
In a healthy endocrine system, cortisol helps limit these inflammatory responses. But for someone with adrenal insufficiency, these effects can be stronger and far more debilitating.
The 3–5 Day Window
For me, the worst symptoms always appear three to five days before my period.
This stage of the cycle is called the late luteal phase, when estrogen and progesterone rapidly decline.
When POTS and adrenal insufficiency overlap during this phase, several systems can destabilize at the same time.
The result can be:
profound fatigue
flu-like exhaustion
intense dizziness
fainting
severe nausea
brain fog
My symptoms became so debilitating each month that I created an annual calendar to track my cycle.
The start of my period is highlighted in red.
The five days before are highlighted in yellow.
Those yellow days signal something critical for me: it’s time to start stress dosing my hydrocortisone because of my adrenal insufficiency.
Without doing this, I have come dangerously close to going into adrenal crisis. And for those who may not know, adrenal crisis is life-threatening.
Do It For You
Living with chronic illness often means learning things about your body that no one prepared you for.
Doctors may diagnose the condition, but the day-to-day patterns of what makes symptoms better or worse are often things patients must figure out on their own. For many people with chronic illness, hormonal changes are one of those hidden triggers.
It’s another reminder that chronic illness isn’t just about one diagnosis. It’s about how multiple systems in the body interact… sometimes in ways that can make already complicated conditions even harder to manage.
And sometimes, the most important medical chart isn’t one in your doctor’s office, but one you create yourself.
If you missed Part 2 of the “We’re All Tired” Series, you can catch up here.