Causes of Excessive Sweating (Hyperhidrosis) | Why Do I Sweat So Much? | Denova

Excessive sweating, or hyperhidrosis, affects millions of people worldwide and can significantly impact daily life, confidence, and social interactions. Understanding the root cause of your hyperhidrosis is the first step towards effective treatment. At Denova Aesthetic Clinic in Islamabad and Rawalpindi, our specialists assess each patient individually to identify the cause and recommend the most appropriate treatment.

What Is Hyperhidrosis?

Hyperhidrosis is a medical condition characterised by excessive sweating that goes beyond what is needed for normal body temperature regulation. Sweating occurs in the absence of physical exertion or heat, often appearing at rest, in cool environments, or in social situations. The condition affects the underarms, hands, feet, face, and groin most commonly, though it can affect the entire body in severe cases.

Primary vs Secondary Hyperhidrosis

Hyperhidrosis is divided into two main types based on its cause:

Primary Focal Hyperhidrosis

Primary hyperhidrosis is the most common type and has no identifiable underlying medical cause. It appears to result from overactivity of the sweat glands due to abnormal nerve signalling. It typically begins in childhood or adolescence and tends to affect specific body areas (armpits, palms, soles, face). There is often a genetic component – many patients have a family member with the same condition.

Primary hyperhidrosis does not improve or worsen based on overall health. It is a standalone condition that requires dedicated treatment such as Botox injections, prescription antiperspirants, or in severe cases, surgical intervention.

Secondary Generalised Hyperhidrosis

Secondary hyperhidrosis is caused by an underlying medical condition or medication. Unlike primary hyperhidrosis, it may affect the entire body rather than specific areas, and may worsen at night. Common causes include:

• Diabetes – Blood sugar fluctuations can trigger excessive sweating episodes
• Thyroid disorders – Hyperthyroidism increases metabolism and body temperature
• Menopause – Hormonal changes cause hot flushes and night sweats
• Anxiety and stress disorders – The stress response activates sweat glands
• Obesity – Increased body mass raises core temperature and sweat production
• Infections – Tuberculosis, HIV, and other infections can cause generalised sweating
• Medications – Antidepressants, beta-blockers, and opioids commonly cause sweating as a side effect
• Neurological conditions – Parkinson s disease and spinal cord injuries can disrupt sweat regulation

Common Triggers That Worsen Hyperhidrosis

Even in patients with primary hyperhidrosis, certain factors can worsen sweating episodes:

• Emotional stress, anxiety, or excitement
• Hot or humid weather
• Spicy foods, alcohol, and caffeine
• Physical activity
• Synthetic fabrics that trap heat
• Certain deodorants or skincare products

How Do I Know If I Have Hyperhidrosis?

Signs that your sweating may be hyperhidrosis rather than normal perspiration include:

• Sweating that soaks through clothing at rest or in cool environments
• Avoiding social situations due to sweat-related embarrassment
• Sweating that affects your ability to use a touchscreen or hold objects
• Needing to change clothing multiple times per day
• Sweating that does not improve with standard antiperspirants
• Sweating that has been present since childhood or adolescence without explanation

A clinical diagnosis of hyperhidrosis is made when a patient has experienced localised excessive sweating for at least 6 months without an obvious cause, with at least two of the above characteristics present.

When Should I See a Doctor About Excessive Sweating?

You should seek medical assessment if sweating:

• Disrupts daily activities or social life
• Began suddenly in adulthood without explanation
• Occurs predominantly at night
• Is accompanied by weight loss, fever, or rapid heartbeat
• Does not respond to prescription-strength antiperspirants

Treatment Options for Hyperhidrosis at Denova

Once the cause of hyperhidrosis is identified, our specialists at Denova recommend the most appropriate treatment:

• Botox injections – The most effective treatment for primary axillary (underarm) hyperhidrosis. Results last 6 to 12 months. See our hyperhidrosis treatment page.
• Prescription antiperspirants – Aluminium chloride-based products as a first-line treatment
• Iontophoresis – Electrical current therapy for palmar and plantar hyperhidrosis
• Oral medications – Anticholinergics to reduce overall sweat gland activity

Frequently Asked Questions

Is hyperhidrosis a serious medical condition?

While hyperhidrosis is not life-threatening, it is a recognised medical condition that significantly affects quality of life. It is associated with higher rates of anxiety, depression, and social withdrawal. Effective treatments exist and patients should not feel they must simply manage it without professional help.

Is excessive sweating hereditary?

Primary hyperhidrosis has a strong genetic component. Studies show that 30 to 50 percent of patients have a family history of the condition. If a parent has hyperhidrosis, there is a higher chance their children will develop it.

Can anxiety cause hyperhidrosis?

Anxiety can trigger and worsen sweating in predisposed individuals. However, primary hyperhidrosis is not caused by anxiety – many patients sweat excessively even when completely calm. Treating hyperhidrosis often reduces anxiety about sweating, creating a positive cycle.