Acromegaly and Sweating

Why sweating is a hallmark of acromegaly

Acromegaly develops slowly and insidiously, so its features accumulate over years. Skin and soft-tissue changes are prominent: broadening of the hands and feet, thickening and deepening of facial features, skin tags and, characteristically, oily, sweaty skin. Sweating in acromegaly is generalized rather than confined to a focal area, and often reported as excessive and troublesome even at rest.

The mechanism is a direct trophic effect on the sweat apparatus. In skin biopsies from patients with active acromegaly, the size of eccrine sweat gland acini and the density of periacinar innervation are greater than in controls, with restoration of these features when GH is treated in GH-deficient patients receiving replacement (Main et al., Auton Neurosci 2001). Immunohistochemistry has also detected IGF-1 in the secretory cells of eccrine sweat glands in acromegaly, supporting IGF-1-driven hyperfunction (reviewed in Ben-Shlomo & Melmed 2006).

A 2023 systematic review pooled clinical-signs data from 124 published studies. Hyperhidrosis was among the most consistently reported features, with a weighted mean prevalence of 47%. The chart places it alongside other cardinal signs and symptoms from the same review.

Reported prevalence varies with era, cohort, and how sweating is defined. Older narrative references quote higher figures (~70%), while modern systematic pooling gives a lower weighted mean (~47%). Both are consistent with hyperhidrosis being one of the most characteristic features of active acromegaly.

What acromegaly-related sweating looks like

Sweating in active acromegaly is typically generalized and often coexists with oily skin, deepening skin folds, an enlarged and coarsened face, broad hands and feet, and skin tags. Endocrinology references describe it as "sweaty, oily skin," underscoring how sebaceous and sudomotor overactivity travel together. Because the underlying process is slow, patients and families often notice these changes only in retrospect (photographs across a decade are more revealing than a single visit).

This pattern is different from primary focal hyperhidrosis (which is limited to palms, soles, underarms or face and is not accompanied by soft-tissue overgrowth) and from the episodic sweats of pheochromocytoma (which come in adrenergic paroxysms). In acromegaly the sweating is a background feature of the disease rather than a symptom in isolation.

How sweating changes with treatment

Treatment of acromegaly aims for biochemical remission: normalization of serum IGF-1, with GH suppression on an oral glucose tolerance test. Case series and long-term cohorts report that sweating and oily skin improve in most patients as IGF-1 falls after successful surgery, somatostatin analogues or GH-receptor blockade. A cross-sectional dermatology study of 99 patients still recorded hyperhidrosis in 27% of the cohort, however, and noted that some cutaneous features (thickened skin, hypertrichosis) persist even in remission, showing that the response of skin features is partial and variable (Barbaros 2024).

This is another way of saying: hyperhidrosis in acromegaly is an on-target consequence of GH/IGF-1 excess, and it is one of the features clinicians and patients follow as an indicator of disease activity.

What this means in plain terms

Excessive sweating is a very common clinical feature of active acromegaly, but on its own it is non-specific. What raises the possibility of acromegaly is the company it keeps: gradual growth of hands, feet and facial features, dental spacing, joint aches, headaches, snoring or sleep apnea, hypertension, or a pituitary tumour found incidentally on imaging. Acromegaly is diagnosed with an IGF-1 blood test and confirmed with a growth-hormone response to glucose, and is treatable, which is why the clustering of these features around persistent sweating is worth flagging to a clinician. This page describes an association; it is not a diagnosis and cannot determine the cause of any individual's sweating.

Methodology and limitations

This page draws on a 2023 PRISMA systematic review of 124 studies (Bengtsson, Pituitary 2023), an Orphanet review of acromegaly (Chanson & Salenave 2008), a peer-reviewed sudomotor histology study (Main et al., Auton Neurosci 2001), a review of skin manifestations in acromegaly (Ben-Shlomo & Melmed 2006), and a recent single-centre cutaneous series (Barbaros 2024), with StatPearls as a standard clinical reference. Each figure was traced to its source.

Limitations: reported prevalence of hyperhidrosis in acromegaly varies widely (roughly 27% to 88% across cohorts), reflecting differences in study era, referral setting, disease activity, and how sweating is captured (self-report vs dermatologic examination). The 47% and 70% figures are pooled/textbook estimates rather than head-to-head comparisons. Skin features improve with biochemical remission but not always completely. The association between acromegaly and sweating is well recognized, but it is not proof of causation in any individual. This page is educational and is not a diagnosis or medical advice.

Frequently asked questions

Is excessive sweating a symptom of acromegaly?

Yes. It is one of the most disease-specific features. A 2023 systematic review of 124 studies gave a weighted mean prevalence of 47% at diagnosis; older narrative references quote around 70%.

Why do people with acromegaly sweat more?

Excess growth hormone and IGF-1 have a direct trophic effect on the skin. Eccrine sweat glands become hypertrophied and their innervation denser, and IGF-1 has been detected in sweat gland cells in acromegaly. The result is a generalized increase in sweating alongside oily skin.

How rare is acromegaly?

Rare. Estimated incidence is about 3 to 4 cases per million people per year, with an estimated prevalence of roughly 40 to 130 per million. Diagnosis is often delayed by many years because features develop slowly.

Does treatment reduce the sweating?

Usually yes, but the response is variable. Case series and cohort studies report that sweating and oily skin improve as IGF-1 normalizes on treatment, though some cutaneous features can persist. Any treatment decisions belong with an endocrinologist.

How is acromegaly diagnosed?

The initial screening test is a serum IGF-1 level. Diagnosis is confirmed by demonstrating that growth hormone does not suppress adequately after an oral glucose load, and pituitary MRI localizes the tumour. Symptoms alone do not make the diagnosis.

Is this page medical advice?

No. It is a summary of verified figures from published sources. Only a clinician can determine whether an individual's sweating warrants investigation for acromegaly or any other cause.

Sources

Primary peer-reviewed studies and official sources first, then reviews and institutional framing (secondary).

1. Bengtsson D, Ragnarsson O, et al. Prevalence of clinical signs, symptoms and comorbidities at diagnosis of acromegaly: a systematic review in accordance with PRISMA guidelines. Pituitary. 2023;26(4):413–424. Weighted mean prevalence of hyperhidrosis 47% across 124 included studies. Full text
2. Chanson P, Salenave S. Acromegaly. Orphanet J Rare Dis. 2008;3:17. "Nearly 70% of patients have sweaty, oily skin." Full text
3. Main KM, Nilsson KO, Ritzén EM, et al. The sweating apparatus in growth hormone deficiency, following treatment with r-hGH and in acromegaly. Auton Neurosci. 2001;93(1–2):68–75. Increased sweat gland acinar size and innervation density in active acromegaly vs controls. PubMed
4. Barbaros MB, Ozdemir S, et al. Cutaneous findings in patients with acromegaly and its relationship with concomitant endocrinopathies. Clin Endocrinol (Oxf). 2024;101(3). Cohort of 99 patients; hyperhidrosis in 27%; literature range for hyperhidrosis 50–88% attributed to eccrine gland hyperfunction. Journal
5. Ben-Shlomo A, Melmed S. Skin manifestations in acromegaly. Clin Dermatol. 2006;24(4):256–259. Reviews cutaneous features including hyperhidrosis and IGF-1-driven mechanisms. (secondary) ScienceDirect
6. Adigun R, Basit H, Murray J. Acromegaly. StatPearls [Internet]. NCBI Bookshelf. Standard clinical reference: annual incidence ~3–4 per million; hyperhidrosis and oily skin are core dermatologic features. (secondary) StatPearls

How to cite this page

Related reading on this site

• Hyperhidrosis and thyroid disease: the association
• Diabetes and sweating: hypoglycemia and autonomic neuropathy
• Drug-induced hyperhidrosis: an evidence overview by class
• Hyperhidrosis statistics: prevalence, age, and daily impact
• Talking to a clinician about sweating