Archive · 2 Nov 2025
Understanding Why We Sweat Under Stress and Anxiety
Imagine your body has tiny factories called sweat glands.
There are two main kinds: one kind helps keep you cool when you're hot, like a built-in fan.
The other kind gets activated when you're scared or stressed, like when you're about to be caught telling a fib.
This happens because your brain sends signals, like a special message called adrenaline, which tells these glands to start working.
Your palms have lots of these glands, so they get sweaty when you're nervous.
Some people have more sweat glands or they work extra hard, which is a condition called hyperhidrosis.
This can make them sweat much more than others, especially when they're feeling stressed.
Sweating under stress is normal, but it doesn't mean someone is lying; it just means they're feeling anxious.
Sweating occurs for temperature regulation and as a response to psychological stimuli like anxiety and stress.
There are two types of sweat glands: eccrine (cooling) and apocrine (stress response via adrenaline).
Stressful situations activate the 'fight or flight' response, leading to increased sweating, particularly in palms, feet, and underarms.
Hyperhidrosis is a medical condition causing excessive sweating, affecting 1-3% in the UK and higher percentages in other countries.
Treatments for hyperhidrosis include antiperspirants, iontophoresis, and botulinum toxin injections.
- Who
- Humans
- What
- Sweating due to stress, fear, pain, or anxiety, and the medical condition hyperhidrosis.
- When
- During stressful or uncomfortable situations, when lying, or due to medical conditions.
- Where
- Throughout the body, particularly palms, feet, and underarms.
- Why
- The body's physiological response to psychological stimuli, activating the 'fight or flight' response via adrenaline and acetylcholine, or due to the condition hyperhidrosis.
- Sweat Gland Types
- Apocrine and Eccrine
- Eccrine Glands
- 90% of sweat glands, cool the body, respond to acetylcholine
- Apocrine Glands
- Located in specific areas, respond to adrenaline (fight or flight)
- Hyperhidrosis Prevalence (UK)
- 1%-3%
- Hyperhidrosis Prevalence (US)
- 5%
- Hyperhidrosis Prevalence (Germany)
- 16%
- Hyperhidrosis Types
- Primary and Secondary