Increased sweating: non-obvious causes and how to deal with them

Increased sweating, known as hyperhidrosis, is a condition in which the body produces an amount of sweat significantly exceeding what is necessary to maintain normal body temperature. It can be localized, affecting specific areas of the body (e.g., palms, feet, armpits), or generalized, manifesting throughout the entire body. Hyperhidrosis causes significant physical and psychological discomfort, reduces quality of life, and is often an indicator of deeper health problems. Understanding its true causes is a key step toward effectively managing this condition.

Hormonal and metabolic causes

Among the most common systemic causes of increased sweating are hormonal imbalances and metabolic disorders. These conditions can affect the body's thermoregulation, causing excessive sweat gland activity.

• Thyroid disorders. Thyroid dysfunction, particularly hyperthyroidism (a condition in which the thyroid gland produces an excessive amount of hormones), is often accompanied by increased sweating. This occurs due to the acceleration of metabolic processes in the body. Studies emphasize the importance of examining thyroid diseases, such as autoimmune thyroid diseases (AITD) [2, 3, 7, 8]. For example, AITD may be a primary cause of hypothyroidism in women of reproductive age [3], as well as affect saliva production, causing dry mouth [7]. Although these studies focus on hypothyroidism or other aspects, they confirm that the thyroid gland plays a central role in regulating many body functions, including thermoregulation. Thyroid peroxidase (TPO) gene variants are also being studied in the context of predisposition to congenital hypothyroidism and AITD [8].

• Diabetes mellitus. This chronic metabolic disease can also be associated with increased sweating, especially at night or as a symptom of hypoglycemia (low blood sugar levels). Studies examining comorbidities in palmoplantar pustulosis indicate an association with diabetes mellitus [2].

• Other metabolic conditions. Dyslipidemia (lipid metabolism disorder) is also mentioned in the context of comorbidities in palmoplantar pustulosis [2]. Although a direct link to sweating is not always obvious, metabolic disorders can affect the body's overall regulation and its response to external and internal stimuli.

Neurological factors and genetics

The nervous system plays a key role in controlling sweating, as sweat glands are innervated by the sympathetic division of the autonomic nervous system. Disruptions in its function can lead to hyperhidrosis.

• Genetic mutations. Certain genetic variants may be associated with neurological conditions that potentially affect the autonomic nervous system. For example, a variant in the ATP1A2 gene is associated with a wide spectrum of clinical phenotypes, including familial hemiplegic migraine type 2 (FHM2), epilepsy, and intellectual disability [1]. Although this study did not directly focus on sweating, central nervous system disorders associated with such genetic alterations can affect autonomic regulation, including control over sweat glands.

• Autonomic dysfunction. Any conditions affecting the function of the sympathetic nervous system, from stress to more serious neurological diseases, can cause excessive sweating. This can manifest as generalized hyperhidrosis or be localized.

Complex impact: from ecology to lifestyle

In addition to internal causes, sweating can be influenced by external factors and lifestyle characteristics. Although direct references to sweating are absent in the provided sources, they indicate mechanisms that can indirectly affect this process.

• Environmental factors. For example, bisphenol A (BPA), a chemical widely used in plastic manufacturing, is being studied as an environmental factor affecting autoimmune thyroid diseases [3]. This highlights that external exposures can indirectly affect hormonal background and, consequently, thermoregulation.

• Lifestyle. Smoking, stress, and focal infections are also mentioned as factors influencing the etiology of certain inflammatory skin diseases, such as palmoplantar pustulosis [2], which may have systemic manifestations and be associated with metabolic disorders that indirectly affect sweating.

Diagnostics and when to see a doctor

If increased sweating has become a persistent problem for you, significantly impairs your quality of life, or is accompanied by other alarming symptoms (e.g., unexplained weight loss, rapid heartbeat, tremors, fatigue, night sweats), it is extremely important to consult a doctor. A specialist will be able to conduct a thorough diagnosis, which may include:

• Taking a medical history and physical examination.
• Blood tests to evaluate thyroid hormone levels (TSH, T3, T4), glucose levels, as well as to detect signs of inflammation or other metabolic disorders [2, 3, 7, 8].
• In some cases, specific tests may be required, for example, to assess nervous system function or genetic studies [1].

Modern approaches to treatment

Treatment for hyperhidrosis directly depends on its cause and can be comprehensive:

• Treatment of the underlying condition. If hyperhidrosis is a symptom of another disease (e.g., hyperthyroidism or diabetes mellitus), then eliminating or controlling this underlying state often leads to the normalization of sweating.

• Topical treatments. Antiperspirants with a high aluminum salt content are the first step in treating localized hyperhidrosis.

• Pharmacotherapy. In some cases, medications that block nerve impulses to the sweat glands (anticholinergics) or other drugs aimed at correcting hormonal background may be prescribed. For example, in the case of genetic mutations, such as the ATP1A2 variant, targeted treatment like memantine can reduce the frequency of migraines and seizures [1], which may indirectly improve overall condition.

• Botulinum toxin injections. Effective for localized hyperhidrosis (armpits, palms, feet), temporarily blocking nerve signals to the sweat glands.

• Physical therapy. Iontophoresis can be used to treat palmoplantar hyperhidrosis.

• Surgical methods. In extreme cases when other methods are ineffective, sympathectomy—surgical cutting of the nerves controlling sweating—may be considered.

Increased sweating is not just a cosmetic problem, but often an indicator of hidden processes in the body. Timely consultation with a specialist and comprehensive diagnostics will help identify the true cause and select the most effective treatment, significantly improving the quality of life.

Sources

1. Prolonged coma and cerebral edema in a patient with an ATP1A2 variant. (Practical neurology, 2026)
2. Evaluation of diabetes mellitus, hyperlipidemia, and thyroid disease comorbidities in palmoplantar pustulosis. (The Eurasian journal of medicine, 2026)
3. Association between bisphenol A and autoimmune thyroid disease in women of reproductive age. (Frontiers in endocrinology, 2024)
4. Association between caries experience and salivary profile in patients with autoimmune thyroid disease — a comparative cross-sectional study. (F1000Research, 2023)
5. Thyroid peroxidase gene variants and susceptibility to congenital hypothyroidism and autoimmune thyroid disease among an Egyptian pediatric cohort. (Clinical and experimental pediatrics, 2026)

Disclaimer: The information provided in this article is for reference purposes only and cannot replace professional medical advice. Always consult a qualified specialist for the diagnosis and treatment of any diseases.