Low cortisol in females mainly comes from adrenal damage, pituitary or hypothalamus disorders, long term steroid use, and rare genetic or autoimmune conditions.
Cortisol keeps blood pressure, blood sugar, energy, and stress responses in balance. When the level drops too low, day-to-day life feels harder and, in severe cases, health can slip into an emergency. The causes of low cortisol in females overlap with those in males, but some patterns show up more often in women, especially around pregnancy, autoimmune disease, and long-term medicine use.
This article walks through the main medical reasons cortisol falls, how those causes differ by life stage, and when low levels might be linked to something serious like adrenal insufficiency. It is general information only and never a replacement for seeing a doctor or endocrinologist for personal care.
Main Causes Of Low Cortisol In Females Explained
When specialists talk about causes of low cortisol in females, they usually sort them into three broad groups:
- Problems in the adrenal glands themselves (primary adrenal insufficiency).
- Problems in the pituitary gland or hypothalamus that cut ACTH or CRH signals (secondary or tertiary adrenal insufficiency).
- Medicine related suppression, especially from long term steroid treatment and sudden withdrawal.
Across these groups sit several female-focused factors, such as a higher rate of autoimmune disease, pregnancy and birth complications, and certain cancer treatments. The table below gives a wide view before we step through each cause in more detail.
| Cause Category | How It Lowers Cortisol | Common Female Contexts |
|---|---|---|
| Autoimmune Addison’s Disease | Immune system attacks adrenal cortex, so glands cannot make enough cortisol (and often aldosterone). | More frequent in women; often linked with other autoimmune conditions such as thyroid disease or type 1 diabetes. |
| Genetic Adrenal Disorders | Inherited enzyme defects limit hormone production in the adrenal cortex. | Family history of adrenal problems, irregular periods, or early puberty in girls. |
| Infections, Bleeding, Or Tumors In Adrenals | Damage or destroy adrenal tissue so output of cortisol falls. | Severe sepsis, tuberculosis, clotting disorders, or metastatic cancer affecting the adrenal glands. |
| Surgical Removal Or Radiation To Adrenals | Partial or full loss of adrenal tissue leads to low or no cortisol output. | Surgery for adrenal tumors, Cushing’s syndrome, or certain cancers; abdominal or flank radiation. |
| Long Term Glucocorticoid Treatment | External steroids suppress ACTH; adrenals shrink and slow cortisol release. | Asthma, autoimmune disease, joint disease, or skin disease treated with oral, injected, or strong topical steroids. |
| Pituitary Tumors Or Damage | Pituitary produces too little ACTH, so adrenal glands never get a strong “make cortisol” signal. | Benign pituitary tumors, pituitary surgery, brain radiation, or injury to the area. |
| Postpartum Pituitary Injury (Sheehan Syndrome) | Severe blood loss during or after birth damages the pituitary, cutting ACTH and other hormones. | Complicated deliveries with heavy bleeding, especially where care reaches the mother late. |
| Hypothalamus Disorders | Reduced CRH from the hypothalamus leads to low ACTH and low adrenal output. | Brain tumors, inflammatory disease, or past head trauma affecting the central stress response. |
| Immune Checkpoint Or Other Cancer Therapies | Some modern cancer drugs can inflame or damage adrenals or the pituitary. | Women treated for melanoma, lung cancer, or other malignancies with immune based therapies. |
Each of these categories can show up with vague symptoms at first, such as fatigue, dizziness, or weight loss, which is why low cortisol is often missed until stress or illness pushes the body past its reserves.
How Cortisol Production Works In The Female Body
To understand the causes, it helps to know where cortisol comes from. The hypothalamus releases CRH, which tells the pituitary to release ACTH. ACTH then reaches the adrenal glands on top of each kidney and signals them to make cortisol. This three step chain is called the HPA axis.
In females, estrogen and progesterone interact with this axis. Hormonal shifts during the menstrual cycle, pregnancy, and menopause can change cortisol binding and feedback loops. These shifts do not usually cause low cortisol by themselves, but they can unmask or worsen adrenal insufficiency when another problem is already present.
When any link in the HPA axis fails, cortisol falls. Damage in the adrenal glands causes primary adrenal insufficiency. Pituitary or hypothalamus problems lead to secondary or tertiary adrenal insufficiency. Long term external steroids act higher up by telling the brain and pituitary that there is already plenty of cortisol in the system, so ACTH production fades and adrenal glands grow quiet.
Primary Adrenal Causes Of Low Cortisol In Females
Autoimmune Addison’s Disease
In many countries, the leading primary adrenal cause of low cortisol is autoimmune Addison’s disease. Here, the immune system mistakes adrenal cortex cells for a threat and slowly destroys them. Over time, the glands cannot make enough cortisol, and often aldosterone drops as well. Women carry a higher risk for many autoimmune disorders, which helps explain why Addison’s disease is often diagnosed in females in mid-adulthood.
Autoimmune Addison’s disease sometimes travels with other autoimmune issues, such as autoimmune thyroid disease, type 1 diabetes, or celiac disease. According to the NIDDK summary of adrenal insufficiency causes, autoimmune attack, abrupt steroid withdrawal, infections, and pituitary damage stand out as common roots of adrenal insufficiency. When a woman has long standing skin darkening, salt craving, weight loss, low blood pressure, and gut upset together, doctors often test morning cortisol and ACTH to look for this pattern.
Infections, Bleeding, And Tumors That Damage Adrenal Glands
Less often, infections such as tuberculosis or severe fungal disease scar the adrenal glands and cut cortisol production. Massive bleeding into the adrenals can also destroy tissue. Tumors that spread from other organs sometimes lodge in the adrenal glands and crowd out healthy cells. These problems can affect both sexes, yet women with chronic infections, blood clotting disorders, or certain cancers face the same risk and may show low cortisol when stress hits.
Genetic Or Congenital Adrenal Problems
Inherited conditions like congenital adrenal hyperplasia change enzymes needed to build cortisol. Some forms are picked up shortly after birth; others appear later with menstrual changes, infertility, or signs of altered androgen levels. In teen girls and adult women, this group of disorders can show up as irregular cycles, problems with growth, or unexpected hair growth along with low cortisol.
Secondary Causes: Pituitary And Hypothalamus Problems
Secondary adrenal insufficiency means the adrenal glands are present but under-stimulated because ACTH from the pituitary is too low. Tertiary adrenal insufficiency sits even higher up, at the level of the hypothalamus, where CRH signals may be weak. Both lead to low cortisol with different lab patterns than Addison’s disease.
Pituitary Tumors, Surgery, And Radiation
Benign pituitary tumors are a frequent source of secondary adrenal insufficiency. Even small growths can press on ACTH producing cells. Surgery to remove pituitary tumors, radiation to the head, or other brain procedures can damage this gland as well. Women treated for pituitary prolactinomas or other pituitary masses sometimes notice fatigue, low blood pressure, and low cortisol months or years after treatment if ACTH output falls.
Postpartum Pituitary Damage (Sheehan Syndrome)
Sheehan syndrome is a classic female-only cause of low cortisol. Severe blood loss or low blood pressure during or after childbirth can starve the enlarged pituitary of oxygen. Over time, this can lead to partial or full loss of pituitary hormone production, including ACTH. The Cleveland Clinic overview of Sheehan syndrome notes that women often present later with an inability to breastfeed, loss of periods, fatigue, and signs of low thyroid and adrenal hormones.
In settings where emergency obstetric care is harder to reach, Sheehan syndrome remains a notable cause of secondary adrenal insufficiency in women. Even many years after the delivery, low cortisol and other hormone deficits may be traced back to that event.
Hypothalamus Disorders And Head Trauma
Problems that affect the hypothalamus, such as brain tumors, inflammatory disease, or heavy head trauma, can cut CRH signals and lead to low ACTH and cortisol. Contact sports injuries, road accidents, or falls can sometimes trigger this pattern. Symptoms may be mild at first and then grow clearer when illness, surgery, or major stress arrives.
Medicine Related Causes Of Low Cortisol In Females
Among all causes of low cortisol in females, medicine related suppression is very common. The body responds to external steroids by turning down its own production. When the dose falls quickly or stops, the suppressed HPA axis may need months to wake up fully.
Long Term Glucocorticoid Treatment And Sudden Withdrawal
Oral prednisone, dexamethasone, injected steroids, and even high dose inhaled or topical glucocorticoids can suppress ACTH when used for weeks or months. The NIDDK material on adrenal insufficiency points out that stopping corticosteroids abruptly after long use is a leading cause of tertiary adrenal insufficiency. Women treated for asthma, autoimmune disease, or chronic pain conditions with repeated steroid courses are especially at risk if doses change quickly.
When external steroids stay high, the adrenal glands shrink and slow their own cortisol output. If pills or injections stop suddenly, cortisol can crash. That is why taper schedules and stress dose plans are so common in steroid therapy. Doctors often check morning cortisol or ACTH stimulation tests before fully stopping long term steroids.
Other Drugs That Can Suppress The HPA Axis
Some cancer immunotherapies can inflame the pituitary (hypophysitis) or the adrenals themselves. Certain antifungal medicines, seizure drugs, and HIV medicines interact with steroid metabolism and, in rare cases, contribute to low cortisol. Women living with complex medical regimens, especially for cancer or autoimmune disease, should ask their prescribing team whether any of their medicines could affect the HPA axis.
Life Stages Where Low Cortisol Shows Up More Often
While the core biology behind adrenal insufficiency is the same in males and females, the timing and context can differ. Females see several health windows where low cortisol may surface or be uncovered by stress.
| Life Stage Or Context | Possible Drivers Of Low Cortisol | What To Watch For |
|---|---|---|
| Late Teens And Early Adulthood | Onset of autoimmune Addison’s disease or genetic adrenal conditions. | Long lasting fatigue, skin darkening, weight loss, salt craving, dizziness when standing. |
| Childbearing Years | Autoimmune disease flares, pituitary tumors, pregnancy related HPA stress. | Irregular periods, fertility concerns, low energy that does not match lifestyle, low blood pressure. |
| During Pregnancy | Pre-existing adrenal insufficiency uncovered by raised hormone demands. | Severe nausea, poor weight gain, low blood pressure, trouble recovering from infections or surgery. |
| Postpartum Period | Sheehan syndrome after severe birth bleeding; delayed flare of autoimmune disease. | Inability to produce breast milk, no period return, hair loss, exhaustion that feels disproportionate to newborn care. |
| Perimenopause And Menopause | Overlap of adrenal insufficiency with thyroid disease or late onset genetic adrenal issues. | Low mood, poor stamina, muscle weakness, low blood pressure that do not fit simple menopause symptoms. |
| Women With Multiple Autoimmune Diseases | Cluster of immune attacks that may add adrenal involvement over time. | Changes in skin color, more frequent low blood sugar episodes, strong salt craving. |
| Long Term Steroid Users | Suppressed HPA axis from chronic glucocorticoid therapy. | Worsening fatigue, body aches, and lightheaded spells when doses drop or stress rises. |
This life stage view does not replace a full medical assessment, but it reminds readers that low cortisol symptoms can blend with other changes, especially around pregnancy and menopause.
How Doctors Check For Low Cortisol Levels
Doctors usually start with a careful history and exam, asking about symptoms, family history, medicines, and past births or surgeries. Morning blood cortisol levels give an initial clue. If cortisol is clearly low, or borderline along with strong symptoms, further tests follow. These may include ACTH levels, ACTH stimulation testing, and imaging of the adrenals or pituitary.
Lab patterns help separate primary from secondary and tertiary causes. In primary adrenal insufficiency, cortisol is low and ACTH is high as the pituitary tries to push the adrenals. In secondary or tertiary forms, both cortisol and ACTH sit low. This distinction guides treatment and monitoring plans.
When To See A Doctor About Possible Low Cortisol
Low cortisol can creep up slowly. Many women blame symptoms on stress, parenting, work, or aging. That can delay care. It makes sense to see a healthcare professional if you notice several of the following together for more than a few weeks:
- Deep fatigue that rest does not fix.
- Dizziness when standing, or frequent near-fainting spells.
- Unwanted weight loss and reduced appetite.
- Strong salt cravings or muscle cramps.
- Ongoing gut upset, such as nausea, vomiting, or loose stool.
- Skin darkening, especially on scars, knuckles, or gums, without extra sun exposure.
- Low mood, brain fog, or trouble handling stress, along with physical symptoms.
Anyone with known adrenal insufficiency should have a clear plan for stress dosing, sick days, and emergency steroid injections. Friends, family members, or caregivers can learn how to help if an adrenal crisis ever occurs.
If a woman ever has severe vomiting, diarrhea, extreme weakness, sharp abdominal pain, confusion, or collapse, especially in the setting of known adrenal disease or recent steroid withdrawal, urgent medical care is vital. Emergency teams can give IV steroids and fluids while sorting out the underlying cause.
Bringing It All Together: Causes Of Low Cortisol In Females
The causes of low cortisol in females center on adrenal disease, pituitary or hypothalamus damage, and medicine related suppression. Autoimmune Addison’s disease, Sheehan syndrome after heavy birth bleeding, pituitary tumors, long term steroid use, genetic adrenal disorders, infections, and modern cancer therapies all sit on this list.
Understanding these patterns helps women speak up early when something feels off. While low cortisol is rare compared with many other conditions, it is treatable once found, and the sooner it is recognized, the easier life usually becomes.