Sweating is a normal part of how the body regulates temperature. However, when sweating becomes excessive—even while resting—it can be uncomfortable, frustrating, and sometimes a sign of an underlying health condition.
We asked Dr. Fausta Viktorija Girulskienė, a specialist in endobiogeny (a holistic approach to medicine), to explain why excessive sweating happens and what can help.
What Is Hyperhidrosis?
Hyperhidrosis is the medical term for excessive sweating that goes beyond what the body needs for normal temperature regulation.
There are two main types of hyperhidrosis.
Primary Hyperhidrosis
This form usually affects specific areas such as the underarms, hands, feet, or face. It is caused by an overactive nervous system and is not associated with another medical condition.
Secondary Hyperhidrosis
Secondary hyperhidrosis is triggered by an underlying condition or medication. Possible causes include:
- Thyroid disorders.
- Diabetes.
- Menopause.
- Certain infections.
- Some medications.
- Less commonly, certain cancers.
This type often causes generalized sweating or night sweats.
Why Does Excessive Sweating Happen?
The nervous system and hormones play a major role in regulating sweat production.
The Nervous System
- The sympathetic nervous system activates the body's "fight-or-flight" response. Stress, anxiety, or emotional triggers may stimulate sweat production even when there is no physical danger.
- The parasympathetic nervous system helps the body relax and recover. Some people naturally have a more reactive nervous system, making them more prone to excessive sweating.
Hormonal Changes
- High thyroid hormone levels can increase metabolism and lead to increased sweating.
- Low estrogen levels, such as during menopause or certain stages of the menstrual cycle, may contribute to hot flashes and night sweats.
Even the odor of sweat may sometimes provide clues. For example, an onion-like smell has been associated with hormonal changes involving estrogen, while a sour odor may occur during stress-related sweating driven by adrenaline.
When Should You See a Doctor?
Although excessive sweating is often harmless, medical evaluation is recommended if:
- It begins suddenly.
- The sweating is unusually severe.
- It is accompanied by unexplained weight loss, poor appetite, or persistent low-grade fever.
Natural Ways to Help Manage Excessive Sweating
Simple lifestyle adjustments may help reduce sweating or make symptoms easier to manage.
Diet and Hydration
- Limit alcohol, caffeine, spicy foods, and greasy meals.
- Eat smaller, more frequent meals.
- Stay well hydrated and include magnesium-rich foods in your diet when appropriate.
Daily Habits
- Choose breathable natural fabrics such as cotton, linen, merino wool, or TENCEL™.
- Keep your bedroom cool, ideally around 18–19°C (65°F).
- Follow the 8/8/8 rule: approximately eight hours of sleep, eight hours of work, and eight hours for leisure and recovery.
- Engage in regular physical activity.
Stress Management
- Practice slow breathing exercises, such as inhaling for four seconds and exhaling for six.
- Try meditation, yoga, or mindfulness to help regulate the nervous system.
- If anxiety contributes to excessive sweating, cognitive behavioral therapy (CBT) or other forms of psychological support may be beneficial.
Herbal Support
Some herbal remedies are traditionally used to support stress management and hormonal balance. These should be used under the guidance of a qualified healthcare professional.
- Chamomile, lemon balm, and lavender may promote relaxation.
- Sage has traditionally been used to support women experiencing menopausal symptoms.
- Motherwort may help support the body's stress response.
- Adaptogens such as rhodiola are sometimes used to improve resilience to stress.
Medical Treatment Options
- Botulinum toxin (Botox) injections can temporarily block the nerve signals that stimulate sweat glands, with effects typically lasting four to six months.
- Prescription-strength antiperspirants may reduce sweating but can sometimes irritate sensitive skin. Natural deodorants can help control odor but generally do not reduce sweat production.
The Bottom Line
Excessive sweating is more than a cosmetic concern—it may be a sign that your body is responding to stress, hormonal changes, or an underlying medical condition.
Identifying the underlying cause, making practical lifestyle adjustments, and seeking medical advice when symptoms are severe or sudden can help you manage hyperhidrosis more effectively.
If excessive sweating is affecting your daily life, don't ignore it. A healthcare professional can help determine the cause and recommend the most appropriate treatment.
