Under stress—whether facing a job interview, exam, or first date—you may sweat excessively on your hands, feet, face, or armpits. How does a simple emotion provoke such a strong physical response?
Sweating is entirely involuntary, much like your heartbeat. It's regulated by the autonomic nervous system, which responds to stress by releasing hormones such as catecholamines. These organic compounds, derived from the amino acid tyrosine, include adrenaline, noradrenaline, and dopamine.
During stress, elevated catecholamine levels in the blood intensely stimulate the sweat glands, leading to profuse perspiration like cold sweats or clammy hands. This can occur across the entire body surface. Anxiety and fear trigger similar responses.
Stress sweating often produces a strong, unpleasant smell. As dermatologist Fabien Guibal explains, it stems from apocrine glands in the armpits, around the nipples, and near the anus. These secrete thick, milky sweat rich in fatty substances and pheromones, which bacteria thrive on, creating odor through bacterial digestion.
In contrast, sweat from exercise—produced by eccrine glands across the skin—has a milder smell. These glands regulate body temperature by expelling watery sweat containing toxins and waste, not fats or pheromones.
Pharmacy doctor Sandrine Nail-Billaud, writing for DoctiPharma, recommends managing excessive sweating by first controlling stress, as adrenaline drives the process. Additional strategies include a healthier diet, avoiding alcohol, tobacco, and coffee; wearing natural fabrics like cotton, linen, or wool; and maintaining hygiene in key areas.
