Excessive Sweating: What You Need to Know

Sweating is a normal part of how the body regulates temperature. However, when it happens excessively—even while resting—it can become uncomfortable and affect everyday life. So what causes excessive sweating, and when should it be evaluated by a doctor?

We asked Dr. Fausta Viktorija Girulskienė, a specialist in endobiogeny, a holistic approach to medicine, to explain the most common causes and practical ways to manage excessive sweating.

What Is Hyperhidrosis?

Hyperhidrosis is the medical term for excessive sweating that goes beyond what the body needs to regulate its temperature.

There are two main types of hyperhidrosis.

Primary Hyperhidrosis

This type usually affects specific areas such as the underarms, hands, feet, or face. It is typically caused by an overactive nervous system and is not associated with another medical condition.

Secondary Hyperhidrosis

Secondary hyperhidrosis is caused by an underlying health condition or medication. Common causes include thyroid disorders, diabetes, menopause, infections, certain medications, and, in rare cases, cancer. It often appears as generalized sweating or night sweats.

Why Does Excessive Sweating Happen?

The nervous system and hormones play a major role in regulating sweat production.

• The sympathetic nervous system activates the body's fight-or-flight response and can trigger sweating even without physical activity.
• The parasympathetic nervous system helps the body relax. Some people naturally have a more reactive nervous system, making them more prone to sweating.

Hormones can also influence sweating.

• High thyroid hormone levels increase metabolism, which can lead to increased sweating.
• Low estrogen levels, such as during menopause or before menstruation, may contribute to hot flashes and night sweats.

Interestingly, body odor may also provide clues. A sharp, onion-like odor has been associated with estrogen-related changes, while a sour smell is often linked to adrenaline.

When Should You See a Doctor?

Although excessive sweating is often harmless, medical evaluation is recommended if:

• The sweating begins suddenly.
• The sweating becomes unusually severe.
• It is accompanied by unexplained weight loss, poor appetite, fever, or other concerning symptoms.

Natural Ways to Manage Excessive Sweating

Small lifestyle changes may help reduce excessive sweating and improve comfort.

Food and Drink

• Limit alcohol, caffeine, spicy foods, and greasy meals.
• Eat smaller meals more frequently.
• Stay well hydrated and include magnesium-rich foods in your diet.

Daily Habits

• Choose underwear made from natural fabrics such as cotton, linen, merino wool, or Tencel.
• Keep your bedroom cool at night, ideally around 18–19°C (65°F).
• Follow the 8/8/8 rule: eight hours of sleep, eight hours of work, and eight hours of leisure.
• Exercise regularly.

Stress Management

• Practice slow breathing exercises, such as inhaling for four seconds and exhaling for six.
• Consider meditation, yoga, or mindfulness techniques.
• If anxiety contributes to sweating, cognitive behavioral therapy may help.

Herbal Support

Herbal remedies should always be used under the guidance of a qualified healthcare professional.

• Chamomile, lemon balm, and lavender may help calm the nervous system.
• Sage may support estrogen balance.
• Motherwort may help regulate cortisol levels.
• Adaptogens such as rhodiola may improve resilience to stress.

Medical Treatment Options

• Botulinum toxin (Botox) injections can temporarily block sweat gland activity for approximately four to six months.
• Clinical-strength antiperspirants may reduce sweating but can sometimes irritate sensitive skin.
• Natural deodorants do not reduce sweating but may help neutralize body odor.

Key Takeaways

Excessive sweating is more than a cosmetic concern. It may be a sign that something in the body is out of balance.

Understanding the underlying cause, making appropriate lifestyle changes, and seeking medical advice when necessary can help manage symptoms effectively.

Most importantly, do not ignore persistent excessive sweating—but there is no need to panic. With the right approach, it can often be successfully controlled.