Autoimmune Polyendocrine Syndrome Type II (Schmidt Syndrome)

What is Autoimmune Polyendocrine Syndrome Type II?

Polyglandular autoimmune syndrome type II, also called Schmidt syndrome, is a cluster of at least two endocrine diseases in one person. It is defined by the combination of type 1 diabetes, autoimmune thyroid disease and Addison disease.^[1] Schmidt syndrome was first described in 1926 as the pairing of Addison disease and chronic autoimmune thyroiditis.^[1]

The most common adult form is the combination of type 1 diabetes with autoimmune thyroid disease.^[2] The conditions often appear years apart, and more than 20 years can pass between the first and the next.^[3]

Common symptoms

Symptoms depend on which glands are involved, and they can overlap, which can delay diagnosis.^{[1, 4]}

• Addison disease: fatigue, weakness, weight loss, low blood pressure, dizziness on standing, darkened skin and salt craving^[4]
• Underactive thyroid (Hashimoto's): tiredness, cold intolerance, weight gain, constipation and low mood
• Overactive thyroid (Graves'): weight loss, fast heartbeat, tremor, heat intolerance and anxiety
• Type 1 diabetes: thirst, frequent urination, weight loss and blurred vision
• Other autoimmune conditions can accompany it, such as vitiligo, celiac disease and pernicious anemia^[2]

Causes and risk factors

The syndrome is multifactorial, with several susceptibility genes reported in the adult types, and it can occur in more than one generation of a family.^{[2, 3]} The autoimmune process usually causes lasting loss of gland function.^[2] Infections and hormonal changes are thought to be triggers, but this is less well established.

How it is diagnosed and treated conventionally

Diagnosis is made by an endocrinologist from blood tests of hormone levels and autoantibodies for each gland, such as low cortisol and aldosterone with high renin in Addison disease.^{[1, 4]} Screening people with one autoimmune gland disease, and their first-degree relatives, for other glandular autoimmunity helps catch the syndrome early.^[2] We do not diagnose or monitor this condition.

Treatment replaces the missing hormones for life and monitors for new conditions. In Addison disease, hormone replacement aims to maintain normal glucocorticoid and mineralocorticoid levels.^[4] Thyroid hormone, and insulin for type 1 diabetes, are standard parts of care in this syndrome, along with regular monitoring.^[1]

Why Autoimmune Polyendocrine Syndrome Type II calls for a whole-person approach

Because several hormone systems are involved, symptoms such as fatigue can come from more than one source, and treatment for one gland can affect another. The syndrome needs coordinated, long-term care.^{[1, 2]}

Supportive care can address daily burdens around this treatment, always with the endocrinologist leading.

Adrenal insufficiency

Addison disease is a rare, life-threatening emergency if untreated, and illness can trigger an adrenal crisis with low blood pressure, low sodium and low blood sugar.^[4] This is why stress and illness need medical attention.

Thyroid function

Autoimmune thyroid disease may cause an underactive or overactive thyroid, and thyroid levels affect energy, mood, weight and temperature tolerance.^[1] Levels are checked by blood tests and treated with medicine.

Blood sugar

Type 1 diabetes requires lifelong insulin because the pancreas' insulin-producing cells are destroyed by autoimmunity.^[5] Blood sugar can fall dangerously low if Addison disease is also present, so any new therapy should be reported to the treating team.^[4]

Stress, sleep and fatigue

Fatigue is a shared symptom of all three conditions.^{[1, 4]} Poorly controlled hormone levels are a common cause and should be reviewed medically before fatigue is attributed to anything else.

Acupuncture as supportive care in Autoimmune Polyendocrine Syndrome Type II

What the research shows

We found no clinical trials of acupuncture for Schmidt syndrome. The closest evidence concerns Hashimoto thyroiditis alone. A meta-analysis of 14 randomized trials with 1,020 people compared acupuncture with levothyroxine and reported greater changes in thyroid antibodies and in TSH, free T3 and free T4 levels.^[6] The review reports laboratory values, not whether people felt better, and its abstract does not describe the quality of the trials, and it did not test acupuncture in people who also have Addison disease or type 1 diabetes. It also should not be read as a reason to change thyroid medicine.

How acupuncture may work

We did not find research explaining how acupuncture might act in this syndrome. The Hashimoto review describes effects on thyroid antibodies and hormone levels, but its abstract does not explain a mechanism.^[6]

What treatment involves

Treatment uses fine, sterile, single-use needles, usually left in place for about 20 to 40 minutes, with a short course of visits and reassessment. Sessions would focus on comfort, relaxation and stress.

Serious problems from acupuncture are rare. In prospective studies, about 9 in 100 patients had a minor reaction such as soreness or bruising at a needle site, and serious events occurred in about 1 in 10,000 patients.^[7] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker (relevant to electroacupuncture). People with diabetes should tell us about low blood sugar episodes and eat as directed before a session, and anyone with adrenal insufficiency should tell us if they feel unwell.

Ayurvedic medicine as supportive care in Autoimmune Polyendocrine Syndrome Type II

The Ayurvedic view

Ayurveda has no single equivalent of a multi-gland autoimmune syndrome. Fatigue, weakness and low vitality are traditionally described as depletion of ojas and imbalances of Vata, while thyroid and diabetes-like conditions are discussed separately under traditional categories. This is a traditional framework, not a biomedical diagnosis.

Therapies that may be used

Care is individualized and gentle, and may include:

• Regular, balanced meals and steady sleep and rest routines, adjusted to your diabetes diet and medicines
• Gentle warm oil massage and stress-reduction practices such as breathing exercises
• Herbs selected by a practitioner after review of your medicines, from tested sources, since some Ayurvedic products contain heavy metals^[8]

Panchakarma is not appropriate during pregnancy, acute illness or frailty, and fasting or purgative therapies are not suitable for people with Addison disease or insulin-treated diabetes, because they risk low blood sugar, dehydration and adrenal crisis.

What the research shows

There are no clinical trials of Ayurvedic treatment for Schmidt syndrome. For single components, the research is small. A 2026 systematic review of 12 studies of integrative therapies in type 1 diabetes, including yoga, naturopathy and Ayurvedic approaches, reported adjunctive benefits on blood sugar, stress and quality of life, and called for larger trials.^[5] A pilot trial of 50 people with subclinical hypothyroidism found that 8 weeks of ashwagandha root extract improved TSH, T3 and T4 levels compared with placebo, and a systematic review of 4 herbal trials in hypothyroidism included it, concluding that more rigorous methods are needed.^{[9, 10]} These results come from a small single-center study and are not about Schmidt syndrome.

Herbal medicine as supportive care in Autoimmune Polyendocrine Syndrome Type II

Herbs and formulas that have been studied

No herbal formula has been studied in Schmidt syndrome. Research exists for Hashimoto's thyroiditis alone, in which Chinese formulas such as Yiqi Huayu Recipe, Liqi Xiaoying decoction and Shugan Sanjie therapy were compared in a network meta-analysis.^[11] Ashwagandha, Nigella sativa and peppermint have been studied in small trials in hypothyroidism.^[10]

What the research shows

The evidence is limited. A network meta-analysis of 16 Hashimoto's trials found that herbal formulas reduced thyroid antibody levels and symptom scores, with no serious adverse events reported and no effect on thyroid function. The authors called the results preliminary and in need of high-quality confirmation.^[11] A systematic review of only 4 trials in hypothyroidism concluded that more extensive methods are needed.^[10]

Safety and herb-drug interactions

Several herbs carry specific risks in this syndrome. Licorice (Glycyrrhiza) is a main example. Its most important side effects are high blood pressure and low potassium, and a meta-analysis of 8 trials found that glycyrrhizic acid raised blood pressure.^{[12, 13]} Licorice side effects are more likely when the enzyme that handles cortisol is less active.^[12] Because blood pressure, potassium and cortisol handling all matter in adrenal disease, licorice is generally best avoided in this syndrome unless your endocrinologist agrees.

Ashwagandha changed thyroid hormone levels in the pilot trial in subclinical hypothyroidism, though not in a safety trial in healthy volunteers, so it could interfere with thyroid medicine or monitoring.^{[9, 14]} Case reports also describe liver injury from ashwagandha supplements.^[15] Herbal and dietary supplements account for about 20% of drug-induced liver injury in the United States.^[16]

Herbs can interact with other medicines too. Case reports link combining warfarin with herbs including dang gui, dan shen, ginger, ginseng and Boswellia to bleeding and other serious effects, and St John's wort can lower levels of some medicines.^{[17, 18]} About one fifth of Ayurvedic products bought online contained detectable lead, mercury or arsenic.^[8] Herbs should come from tested sources and be prescribed individually. Tell us if you are pregnant or breastfeeding, or have liver or kidney disease.

Translating traditional medicine into modern biological language

The links drawn here are interpretation, not equivalence. Chinese medicine often describes fatigue and cold intolerance in thyroid and adrenal disease as deficiency of kidney yang or qi, and Hashimoto's formulas are written to support spleen and kidney function and to move stagnation. Researchers measure thyroid antibodies, TSH and thyroid hormones when testing these ideas.^{[6, 11]}

Ayurveda's depleted ojas and Vata describe the experience of low energy and weakness in traditional terms. No study has shown that a traditional pattern corresponds to the autoimmune processes in this syndrome.

How this care fits with your medical care

This syndrome needs lifelong care from an endocrinologist. For a condition like this, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care. Our role is supportive, aimed at comfort, stress and fatigue, after your hormones are established and monitored.

Do not stop, skip or change steroid replacement, thyroid medicine or insulin, and keep your monitoring appointments. Please bring your diagnoses, recent hormone and blood sugar results, a full medicine list including your steroid dose plan for illness, and any supplements.

When to seek urgent medical care

Adrenal crisis and diabetic emergencies can develop quickly in this syndrome.^[4]

• Severe weakness, dizziness or fainting, low blood pressure, vomiting or severe abdominal pain, especially during an illness (possible adrenal crisis)
• Confusion, shakiness, sweating or a seizure, which can signal low blood sugar
• Excessive thirst, vomiting, fast breathing or fruity breath with high blood sugar (possible diabetic ketoacidosis)
• A very fast heartbeat, high fever or severe agitation with an overactive thyroid
• Missed steroid doses or vomiting that stops you keeping medicine down

If you have any of these, call 911 or go to the nearest emergency department.