There isn't one single "sweat hormone." Sweating is a complex process regulated by both the nervous system and hormones. While several hormones influence sweating, none are solely responsible for its production.
Hormones Affecting Sweating
Several hormones can influence the rate and amount of sweating. These include:
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Epinephrine (Adrenaline): This hormone, released during stress or fear, significantly increases sweating. As stated in a reference, “The hormone that causes sweating under fear is epinephrine or adrenaline."
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Androgens: These sex hormones influence the number and size of sebaceous glands which are linked to sebum production, but not directly sweat production. A reference states that “The rate of sebum production is related to the number and size of glands which is under hormonal (androgen) control."
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Thyroid Hormone: Medications containing thyroid hormone are listed among factors that can cause increased sweating (MedlinePlus).
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Other Hormones: Hormonal changes during menopause, as referenced in several sources, can lead to increased sweating (hot flashes and night sweats), indicating the involvement of various hormones, including estrogens and others.
The Role of the Nervous System
It's crucial to understand that the nervous system plays a dominant role in sweat production. The sympathetic nervous system directly stimulates sweat glands. Hormones primarily modulate the activity of this system, influencing the intensity of sweating, rather than initiating it.
Understanding Sweat Glands
Sweat glands are exocrine glands. As noted in a reference, "Exocrine glands secrete sweat from your sweat glands..." Their function is regulated by both neural and hormonal mechanisms.
In summary, while various hormones impact sweating, there is no single hormone solely responsible for it. The process is a complex interplay between the nervous system and a variety of hormones.
