Eccrine Glands: An Evidence-Based Guide for Patients

Eccrine glands are the body’s main sweat glands. They help control temperature, support skin health, and can be involved in conditions such as excessive sweating, reduced sweating, heat rash, and some skin tumors.

Overview: what eccrine glands do

Eccrine glands are tiny sweat glands located in the skin. Their main job is to produce a clear, watery sweat that helps the body cool down as it evaporates from the skin surface. In simple terms, eccrine glands are an essential part of temperature control.

These glands are found almost everywhere on the body, with high concentrations on the palms of the hands, soles of the feet, and forehead. Unlike apocrine glands, which are linked to hair follicles in areas such as the armpits, eccrine glands open directly onto the skin. They begin working early in life and are active every day.

Eccrine glands do more than manage heat. Sweat helps keep the skin environment balanced, contributes to the skin’s natural protective barrier, and may support grip on the palms and soles. Most people only notice them when they sweat during exercise, hot weather, stress, or fever, but their activity is continuous and closely regulated by the nervous system.

When eccrine glands do not work normally, symptoms can range from bothersome sweating to poor heat tolerance. Some conditions are mild and temporary, while others may need evaluation by a dermatologist or another specialist.

How eccrine glands work

Eccrine glands are coiled structures deep in the skin. They make sweat in the secretory portion of the gland, and the sweat then travels through a narrow duct to the skin surface. The fluid is mostly water, with small amounts of salts and other substances.

The brain helps control eccrine sweating through the autonomic nervous system. When body temperature rises, signals travel to these glands and increase sweat production. Emotional stress can also activate eccrine glands, especially on the palms, soles, and forehead, which is why hands may become sweaty during anxiety or tension.

As sweat moves up the duct, some salt is reabsorbed, which helps the body conserve important electrolytes. This is one reason sweating patterns may differ between people and in different health states. In hot conditions or during exercise, the body can adjust how much sweat is made to maintain a safer internal temperature.

Healthy eccrine gland function depends on several factors, including normal nerve signaling, intact skin, hydration, and overall health. Conditions affecting nerves, hormones, skin structure, or fluid balance can change how these glands behave.

Common eccrine gland problems and symptoms

The most familiar eccrine gland disorder is excessive sweating, called hyperhidrosis. This may affect the whole body or specific areas such as the palms, soles, underarms, or face. People often describe sweating that seems out of proportion to the temperature or activity level and that interferes with work, social life, or sleep. More information on hyperhidrosis can help explain this condition.

At the other end of the spectrum is too little sweating, known as hypohidrosis or anhidrosis. When the body cannot sweat normally, it may struggle to cool itself. Symptoms can include heat intolerance, dizziness in hot weather, flushing, muscle cramps, or feeling overheated during exercise.

Blocked eccrine ducts can also cause miliaria, often called heat rash. This is more common in hot, humid settings and can lead to small itchy or prickly bumps. In babies, older adults, and people who are ill or on bed rest, blocked sweat ducts may develop more easily.

Rarely, tumors can arise from eccrine structures. Many are benign, but some skin growths need medical assessment because they can mimic other conditions. Warning signs include a persistent lump, a changing lesion, bleeding, pain, repeated infection, or a sore that does not heal.

• Excessive sweating of the hands, feet, face, or body
• Very little sweating despite heat or exercise
• Heat rash with small bumps or prickling discomfort
• Skin irritation, odor, or secondary infection from persistent moisture
• New or changing skin nodules near sweat gland openings

Causes and risk factors

Eccrine gland symptoms can happen for many reasons. Primary focal hyperhidrosis often begins without another illness being found and may run in families. It commonly starts in childhood or adolescence and affects limited areas such as the palms or soles.

Secondary sweating changes may be linked to an underlying medical problem, medication, or environmental exposure. Excess sweating can occur with fever, infection, thyroid disorders, menopause, low blood sugar, anxiety, obesity, or some medicines. Reduced sweating may be related to dehydration, burns, nerve damage, diabetes, certain medications, autoimmune disease, or inherited conditions.

Skin conditions can also affect eccrine ducts and nearby tissue. Hot and humid climates, tight clothing, heavy skin products, and prolonged bed rest can increase the risk of heat rash. Repeated friction on the feet or hands may make sweating symptoms more noticeable in some people.

Because sweating is controlled by both skin and nerves, doctors may also consider neurologic or systemic causes when symptoms are unusual. For example, a person with reduced sweating on one side of the body, sudden widespread sweating, or dizziness with heat may need a broader medical evaluation. Sometimes related conditions such as diabetes or skin cancer may be part of the discussion, depending on the symptoms.

How doctors diagnose eccrine gland disorders

Diagnosis starts with a careful medical history. A doctor will ask when symptoms began, which areas are affected, whether heat or stress triggers them, and whether there are associated problems such as rash, faintness, weight loss, palpitations, numbness, or medication changes. This information often helps distinguish a primary sweating disorder from a symptom caused by another condition.

A physical examination looks at the pattern of sweating, skin health, hydration, and any signs of systemic illness. In some cases, the doctor may recommend blood tests to check for infections, thyroid disease, diabetes, or other causes. If reduced sweating is the main concern, evaluation may focus on nerve function, hydration status, and underlying skin disorders.

Special tests are sometimes used. These may include sweat mapping tests, thermoregulatory sweat tests, or skin biopsy in selected situations. If there is a suspicious skin growth, a biopsy may be needed to identify whether it is a benign sweat gland lesion or another type of skin condition.

When a structural skin lesion is present, imaging or specialist assessment can help guide treatment. If surgery is being considered for a troublesome growth, doctors may discuss options such as dermatologic surgery based on the location and diagnosis.

Treatment options

Treatment depends on the exact eccrine gland problem and its cause. For excessive sweating, first-line care often includes prescription-strength antiperspirants and practical measures such as breathable clothing and skin protection. If symptoms persist, doctors may recommend additional therapies aimed at reducing sweat production in the affected area.

Common options for focal hyperhidrosis can include oral medicines, iontophoresis for hands or feet, and injections that reduce sweat gland activity. For selected patients, botulinum toxin treatment may help control localized sweating for a period of time. In severe cases that do not improve with simpler measures, procedural or surgical options may be considered after specialist review.

If the problem is too little sweating, treatment focuses on safety and the underlying cause. This may include reviewing medications, treating nerve or endocrine disorders, improving hydration, and avoiding overheating. People with anhidrosis or marked hypohidrosis may need practical heat-avoidance plans, especially during exercise or hot weather.

For heat rash, the main approach is cooling the skin, reducing sweat trapping, and keeping the area dry. If a rash becomes infected or a skin lesion is suspicious, dermatology care is important. Depending on the findings, a doctor may recommend dermatology evaluation or referral for skin biopsy to clarify the diagnosis.

Prevention and self-care

Not every eccrine gland disorder can be prevented, but simple daily habits can reduce symptoms and protect skin. Staying well hydrated, dressing in lightweight breathable fabrics, and avoiding prolonged overheating are helpful for most people. During exercise or hot weather, cooling breaks and shade can reduce stress on the body’s heat-control system.

For people with excessive sweating, regular bathing, gentle drying, and changing socks or clothing when damp can lower the risk of skin irritation. Shoes that allow ventilation and absorbent insoles may help if the feet are affected. Fragrance-free products are often better tolerated when the skin is sensitive.

If heat rash is a recurring problem, it helps to keep the skin cool and avoid thick ointments that may block ducts in hot climates. Loose clothing and prompt showering after sweating can be useful. Babies and older adults may need extra attention because they can overheat more easily.

People with reduced sweating should be especially careful with exercise, saunas, hot baths, and summer travel. They may benefit from planning activity during cooler hours and stopping immediately if they feel faint, confused, unusually tired, or too hot. A personalized plan from a clinician is often the safest approach.

When to seek medical care

Medical advice is appropriate when sweating changes suddenly, becomes severe, or starts interfering with daily life. A doctor should also assess symptoms if there is very little sweating with heat intolerance, repeated heat rash, or a new skin lump that does not go away. These issues are often treatable, but the cause needs to be identified.

Urgent medical care is important if overheating is accompanied by confusion, fainting, chest pain, severe weakness, or trouble breathing. Sudden drenching sweats with fever, unexplained weight loss, or heart symptoms also deserve prompt evaluation because they may be related to another medical condition.

For persistent skin changes, a dermatologist may be the most helpful specialist. If surgery, biopsy, or a multidisciplinary opinion is needed, this can often be arranged through a coordinated care team. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat sweat gland and skin-related conditions for international patients.

Even when symptoms seem mild, a professional assessment can provide reassurance, identify triggers, and guide practical treatment. Early evaluation is especially helpful for children, older adults, and people with diabetes, neurologic disease, or recurring overheating.

Frequently asked questions

What are eccrine glands?

Eccrine glands are small sweat glands found across most of the body. They produce watery sweat that cools the skin as it evaporates and helps the body regulate temperature.

Where are eccrine glands found in the body?

They are widely distributed in the skin and are especially dense on the palms, soles, and forehead. Unlike some other sweat glands, eccrine glands open directly onto the skin surface.

What is the difference between eccrine and apocrine glands?

Eccrine glands mainly produce clear, watery sweat for cooling. Apocrine glands are found in areas such as the armpits and groin, are associated with hair follicles, and produce a thicker secretion that can contribute to body odor when broken down by skin bacteria.

Can eccrine glands cause excessive sweating?

Yes. Overactivity of eccrine glands is a main reason for hyperhidrosis, especially in the hands, feet, face, and underarms. A doctor can help determine whether sweating is primary or related to another medical condition.

What happens if eccrine glands do not work properly?

If they make too much sweat, a person may develop excessive sweating, skin irritation, or recurrent moisture-related problems. If they make too little sweat, the body may not cool efficiently, which can lead to heat intolerance and increase the risk of overheating.

Is heat rash related to eccrine glands?

Yes. Heat rash often happens when eccrine sweat ducts become blocked, trapping sweat under the skin. This can lead to small bumps, prickling, itching, or discomfort, especially in hot and humid conditions.

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.