Concern
20 plain-language articles on hormones & endocrine — the physiology, the compounds researched for it, and what the evidence actually shows.
20 articles
Adrenal fatigue isn't the right name — but the picture is real
You're exhausted in a way sleep doesn't fix. You wake up tired. Mornings feel impossible. Coffee gets you to a baseline but doesn't make you functional. Your blood work is "normal." Maybe a friend or a wellness practitioner has used the phrase "adrenal fatigue" to describe what you're going through. Mainstream medicine has dismissed the term. Both can be true at once: the name is wrong, and the experience is real.
Why chronic stress isn't a feeling — it's a physical state
You don't feel stressed the way you feel hungry. Hunger is a signal that goes away when you eat. Chronic stress doesn't go away when the stressful thing ends — and a lot of the time, you can't even point to what the stressful thing is. It's just there. In your shoulders, in your sleep, in the way your stomach feels at four in the afternoon for no obvious reason.
Why your cycle gets worse during stressful seasons
During the easy seasons, your cycle is mostly cooperative. Mild PMS, predictable timing, manageable flow. Then a stressful stretch hits — a job change, a family situation, a sustained period of overwork — and the cycle starts behaving differently. PMS gets harder. The luteal phase becomes treacherous. Periods get heavier or longer, or skip altogether. Ovulation pain shows up. By the time things calm down, the cycle has rewritten itself.
Endometriosis and the inflammation cycle
Endometriosis is a structural disease. Ectopic endometrial-like tissue grows where it doesn't belong — on the ovaries, the peritoneum, the bowel, occasionally further afield — and it responds to the cyclical hormonal signals that drive the uterine lining. The lesions bleed, scar, and adhere. The pain is organic. The management is surgical and medical, and that has to be said clearly before anything else.
The four shifts of perimenopause — and which ones are driven by stress
Perimenopause is often described as a single transition, but the lived experience is more like four overlapping shifts happening at once — each with its own mechanism and its own timeline. Sleep changes, mood changes, cycle changes, hot flashes, energy collapse, weight redistribution, brain fog. They don't all share the same driver, which is why a single intervention rarely addresses all of them and why women describe perimenopause as feeling like several different transitions stacked on top of each other.
Heart rate variability — what it actually tells you about your nervous system
If you've worn an Oura ring, a Whoop band, or a Garmin watch for any length of time, you've seen the HRV number. Some days it's higher, some days lower. The app tells you what the number means, but the meaning is usually surface-level: green is good, red is bad, recovery score, training readiness. What's actually happening physiologically, and why this single metric matters as much as it does, is worth understanding more carefully.
Why your nervous system is stuck in alarm — and how to teach it to come back
You can be doing nothing — sitting on the couch, reading a book — and feel like your nervous system hasn't gotten the memo. Heart rate slightly high. A faint sense of needing to be doing something. Breathing shallow. The body braced for nothing in particular. That's sympathetic dominance, and it's one of the most measurable, mechanical, and reversible aspects of the chronic stress state.
PMDD and the cortisol-progesterone connection
PMDD is not bad PMS. It's a distinct, diagnosable condition where the luteal phase doesn't just feel uncomfortable — it becomes destabilizing. Mood collapses. Rage arrives without warning. Suicidal ideation can show up in women who feel completely well three days later, after the period starts. The pattern repeats month after month, and the recognition that the timeline is hormonal does nothing to soften the experience of living through it.
Prostate inflammation and the autonomic nervous system
Nocturia three or four times a night. A weaker stream. The sense of incomplete emptying. A persistent low-grade pelvic discomfort that the imaging doesn't quite explain. Most men with these symptoms are told they have benign prostatic hyperplasia or chronic prostatitis, are offered an alpha-blocker or a 5-alpha-reductase inhibitor, and are sent on their way. The structural diagnosis is often correct. It's also often incomplete — because the prostate sits at a junction where structure, hormones, and the autonomic nervous system meet, and the symptom load is rarely produced by structure alone.
Why your resting heart rate keeps creeping up
Your watch has been tracking your resting heart rate for years. The trend is what's catching your attention now. Three years ago, it averaged 58. Now it sits closer to 68. Your fitness hasn't dropped that much. You haven't gained that much weight. But the line on the chart keeps drifting upward, and somewhere along the way, your blood pressure readings started edging up too.
TMJ that won't relax — the autonomic component nobody addresses
You got the night guard. You did the physical therapy. You learned to notice when you were clenching during the day and consciously let it go. Maybe you tried botulinum injections in the masseter, or trigger point work, or massage. Things improved — but then they plateaued. The jaw still wakes you up tight. The temple ache is still there. Whatever you do at the muscle level, the tension keeps regenerating.
The thyroid-cortisol connection — why your T3 stays low
You've had the labs done. TSH is in range. Free T4 is in range. You're either on a stable levothyroxine dose or your thyroid is working fine on its own. And yet — the fatigue. The cold hands. The slow recovery. The morning weight that won't budge. The labs say one thing and your body says another. If this is your experience, low T3 syndrome is worth understanding.
Uterine fibroids and the stress factor
Fibroids are extraordinarily common — by age 50, the majority of women have at least one — and they range from incidental findings on a routine ultrasound to lesions that drive heavy bleeding, anemia, and pressure symptoms that meaningfully interfere with daily life. The conversation about fibroids and stress isn't whether stress causes them; it's whether the hormonal and inflammatory environment that influences their growth velocity is partly shaped upstream. The honest answer is yes — within limits worth being precise about.
Argipressin (vasopressin) — what the antidiuretic hormone does in acute care
The patient's blood pressure has been falling for hours. The ICU team has given norepinephrine, then more norepinephrine, then more again. The vasopressors are doing less than they should. At some point in that sequence, the intensivist reaches for a different molecule — one that works through a different receptor pathway entirely, one that the body normally makes itself, one that has been sitting in the endocrine system since before mammals had an immune response evolved enough to produce septic shock. Vasopressin. The decision to add it to the norepinephrine drip isn't dramatic; it happens in a sentence in the order set. But the pharmacology behind that decision reaches back to some of the most fundamental biology of fluid and pressure regulation in vertebrates.
Your body temperature has stopped regulating — what the cold hands and night sweats are telling you
Your hands are cold right now. They're cold in the office when everyone else is comfortable. Cold in the car before the heat kicks in, and still cold after. You wear a cardigan in July and your colleagues look at you like you're performing. Then, at two in the afternoon, something shifts — a flush moves through your chest and neck, not dramatic, not the full-face red of embarrassment, but unmistakable, and you need to take off the cardigan. By evening you're comfortable. By three in the morning you wake drenched, the sheets changed, pillow turned over, lying still waiting for a body temperature that feels like it belongs to someone who's running a fever and trying to hide it. By morning you're cold again.
Cold hands and feet all the time — what's happening at the small vessels
The room is warm. It's summer, or the heat is on, or you're wearing socks and have been sitting still for an hour. And your hands are still cold. The fingers don't warm up the way everyone else's seem to — you shake someone's hand and they notice, or you put your feet against your partner at night and they flinch. Sometimes the color changes. The fingertips go white when you step outside, then take on a bluish cast, then flush back to pink in a way that happens too visibly and too dramatically for weather that shouldn't be doing this. And when you mention it to a doctor, the response is usually some version of: some people just run cold.
Beyond the Thyroid: How Hashimoto's Damages the Gut and Starves You of Iron
Most people with Hashimoto's are told a simple story: the immune system attacks the thyroid, the thyroid slows down, you take levothyroxine, done. That story is incomplete in a way that matters. Hashimoto's is frequently a two-organ disease. The same autoimmune process that goes after the thyroid often goes after the stomach, and the stomach is where iron absorption lives or dies.
Coming off birth control — the cycle that doesn't quite return
You stopped the pill on a Sunday. Your doctor said your cycle would return in a few weeks. Maybe a month. By month three, you had a period — one period — and then silence for another eight weeks. The acne that started showing up on your jaw looked exactly like what you had at seventeen. Your skin was oily in a way it hadn't been in years. Your hair felt different. You felt different, in a way that's hard to articulate but impossible to ignore — more reactive, more raw, cycling through moods in ways you didn't remember doing before. The pill, you realized, had been doing more than preventing pregnancy.
Night sweats that aren't menopause — what else drives them
You wake at 3am and the sheets are soaked through. Not warm — drenched. There's a chill at the edge of it because the room is cool, the window is open, and your body has generated enough heat to saturate the fabric underneath you. You change the shirt. Sometimes the sheets. Sometimes you lie there damp and try to figure out what just happened. It may have happened the night before too, and the night before that. Your partner hasn't noticed anything wrong with the room temperature. It's specifically you.
The water you can't drink enough of — what unrelenting thirst is signaling
You finish the glass and you're already thinking about the next one. The water bottle is never far, and it never seems to land — you drink and drink and the dryness in your mouth just resurfaces, a low background thirst that follows you through the afternoon. At night it wakes you: a parched mouth, tongue stuck to the roof of it, and the walk to the kitchen, and then the walk to the bathroom that feels like it comes around more often than the math of what you drank should allow. In the morning you do it again. It doesn't feel like ordinary thirst. It feels like a thing that won't be answered.