Why do I sweat so much? 9 causes of (excessive) sweating
You notice it during a simple walk, a quiet conversation, or even while sitting still. Sweating without an immediate logical explanation can be frustrating, especially if you feel it’s more than most people around you. There's usually no single cause, but a combination of factors that together determine how much you sweat. Here are nine common causes, with a concrete tip for each point.
By Zero·One Redactie
1 July 2026
4 min. reading time
1. Stress and tension
Your body has two types of sweat glands: eccrine glands, which respond to heat, and apocrine glands, which primarily respond to emotion and stress. Under tension, anxiety, or nervousness, your body produces extra sweat, regardless of the ambient temperature.
Tip: breathing exercises before a stressful moment (slowly inhaling through the nose, exhaling longer through the mouth) can temper the immediate stress reaction. In the long term, it helps to prevent tension from building up until the moment itself, for example, by preparing well for a presentation or conversation.
2. Caffeine
Caffeine stimulates your nervous system and increases your heart rate, which your body interprets as a reason to sweat. In sensitive individuals, even one cup of coffee can have a noticeable effect.
Tip: pay attention to when you drink caffeine just before situations where you'd prefer to stay dry, such as a job interview or presentation. On those days, consider opting for decaffeinated coffee or tea.
3. Spicy food
Capsaicin, the substance that gives spicy food its heat, activates the same temperature sensors in your body as actual heat. Your body responds by sweating, even if the "heat" is only in your mouth.
Tip: this effect usually subsides within an hour after eating. Don't plan spicy meals just before moments when you want to stay dry.
4. Hormonal fluctuations
Hormones play a major role in sweat regulation. This applies not only during menopause, but also during the menstrual cycle, pregnancy, and with hormonal disorders such as thyroid problems.
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Tip: if you notice a clear pattern, for example, linked to your cycle, keeping a short log can help you understand when you need extra protection. For menopausal symptoms specifically, read [Sweating during menopause: hot flashes and night sweats, and what helps].
5. Certain medications
Various medications have excessive sweating as a side effect, including some antidepressants, blood pressure medication, and painkillers. This is often mentioned in the leaflet under side effects.
Tip: if you suspect a medication is the cause, discuss this with your GP or pharmacist before stopping the medication yourself. Often there are alternatives or adjustments possible without having to discontinue treatment.
6. Overweight
A larger body surface produces more heat, and that heat needs to be dissipated through sweat. Additionally, overweight can increase the insulating effect of adipose tissue, making it harder for heat to escape through the skin and requiring the body to sweat more to cool down.
Tip: this is not a matter of "just losing weight" as a quick fix, but with a gradual change in weight, a reduction in sweat production can be an additional effect. In the meantime, focus on breathable clothing and an effective antiperspirant.
7. Genetics
Excessive sweating without an identifiable cause often occurs in multiple members of the same family, indicating a hereditary component. If your parents or siblings also suffer from this, you are more likely to experience it as well.
Tip: if it runs in the family, it is even more important to find a structural approach instead of waiting for it to "go away on its own." See [What is excessive sweating? Causes, types and solutions] for a complete overview of solutions.
8. Warm or humid environment
This may seem obvious, but it is often underestimated as a factor: a poorly ventilated workplace, a hot car, or humid weather all increase the basic load on your sweat glands, in addition to any other causes.
Tip: where possible, choose breathable fabrics such as cotton and linen, and ensure adequate ventilation in places where you spend a lot of time.
9. Alcohol
Alcohol dilates blood vessels close to your skin's surface, which creates a warm sensation and stimulates sweat production. This is why many people feel noticeably warmer and sweat more than usual after a few drinks.
Tip: alternating with water while drinking not only helps against dehydration, but also limits the degree to which your body temperature rises.
What if multiple causes are at play simultaneously?
Most people recognize themselves in more than one point on this list. That's normal: sweating is a sum of your physiology, your habits, and your environment. Instead of trying to avoid every individual trigger, it is often more effective to establish a structural foundation that works independently of these factors.
An antiperspirant applied in the evening that provides several days of protection, such as Zero·One antiperspirant wipes, addresses sweat production itself, regardless of whether the trigger that day is caffeine, stress, or warm weather. This means you don't have to manage every situation separately to stay dry.
Frequently asked questions
Can I reduce sweating by adjusting my diet? Caffeine, alcohol, and spicy food can trigger sweating in sensitive individuals. Avoiding these at important moments can help, but a dietary adjustment does not change underlying sweat production if there is also a genetic or hormonal component involved.
Is excessive sweating always hereditary? No, it can also be caused by hormonal changes, medication, overweight, or environmental factors, without a hereditary predisposition.
Can stress-related sweating be treated? Breathing techniques and stress management can reduce its intensity. For the physical effects, such as wet armpits, an effective antiperspirant provides immediate relief, regardless of the underlying stressor.
Should I see a doctor if I notice I sweat more than others? If it significantly impacts your daily life, or if it starts suddenly and without clear reason, a conversation with your GP is a good step. For most people, however, excessive sweating is manageable without medical intervention.
Does addressing multiple causes simultaneously help? Yes, a combination of conscious choices (clothing, diet, stress management) and an effective antiperspirant usually yields the best results.
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