Sweat glands are an important part of the human body’s excretory system that play a role in maintaining balance. Sweat is a natural body fluid produced by the sweat glands in your skin.
When you sweat during exercise, exposure to sunlight, or hot weather, it can actually be beneficial for your body.
If the weather is hot, your body will produce more sweat than usual. This is intended to cool down your body temperature.
Nonetheless, as a result, the body loses fluids and can become dehydrated. Therefore, to replace these lost fluids, you need to drink enough water to avoid dehydration.
Nevertheless, not all sweating indicates a healthy condition. Some types of sweating may be the result of certain health problems. To understand this further, let’s take a look at the explanation below!
Functions of Sweat Glands
After learning about the structure of sweat glands, let’s now discuss their functions. Some of the functions of sweat glands include:
1. Maintaining Normal Body Temperature
The primary function of sweat glands is to keep body temperature normal.
In essence, sweat glands function to maintain normal body temperature. Sweat glands are connected to neurons, so the sweating process is also controlled by the central nervous system.
Thermosensitive neurons in the brain can detect internal body temperature and external skin temperature, instructing sweat glands to respond accordingly to maintain a constant core body temperature.
When the body detects that it is too hot, the sweat glands release water onto the surface of the skin to cool both the skin and the blood flow beneath it.
As a result, body temperature becomes stable again. This is the body’s natural way of reducing excess heat, which can otherwise cause symptoms such as nausea, headaches, and even fainting.
2. Removing Toxins from the Body
Another function of sweat glands is to remove toxins from the body. There are many harmful substances that may enter the body through food, drinks, or pollution.
In general, these substances are excreted through feces and urine. Nonetheless, some believe that sweat glands can also help remove toxins through sweat.
Even so, scientific evidence supporting this is still limited and requires further research.
3. Moisturizing the Skin and Hair
Another function of sweat glands for the skin and hair is acting as a natural lubricant.
This is because sweat glands are closely related to the sebaceous glands in the skin. Together with the skin’s natural oils, sweat helps keep the skin and hair moisturized, preventing dryness and damage.
4. Eliminating Bacteria
Bacteria on the skin can negatively affect health. Therefore, sweat glands help remove these bacteria from the body, supported by glycoproteins.
Recent immunohistochemical studies show that sweat glands produce and release antimicrobial peptides such as dermcidin, cathelicidin, and lactoferrin, indicating a potential role of sweat in defending against skin infections.
5. Indicating Health Conditions
Sweat production can also be an indicator of health. For example:
- Hyperhidrosis: Excessive sweating without a clear cause.
- Anhidrosis: No sweating at all, which may indicate a disorder of the sweat glands.
Structure of Sweat Glands
The human body is estimated to have around 1.6 to 5 million sweat glands, and this number varies among individuals. Sweat glands are generally divided into two types: eccrine and apocrine glands.
1. Eccrine Glands
Eccrine glands are distributed throughout the skin, except in certain areas such as the lips, clitoris, penis, and labia minora. Their structure resembles a coiled tube and consists of two parts: the secretory portion and the duct.
Eccrine glands function from early life. From the age of 2–3 years, the total number remains constant throughout life. The highest density is found on the palms and soles (approximately 250–550 glands/cm²), and they respond to emotional and thermal stimuli.
The secretory portion lies deep within the dermis and contains two types of cells: clear cells that produce water and electrolytes, and dark cells that release macromolecules found in sweat.
Eccrine glands produce most of the sweat, especially the clear, watery type. Nevertheless, it is not pure water, as it contains small amounts of salt, protein, urea, and ammonia. Most eccrine glands are found on the palms, soles, and forehead.
2. Apocrine Glands
Unlike eccrine glands, apocrine glands are only found in specific areas such as the scalp, armpits, breasts, face, and perineum. These glands are larger and softer, and their structure is not coiled like eccrine glands.
After puberty, apocrine glands produce thicker secretions. This is why they are often associated with body odor. In fact, sweat itself is odorless, but when apocrine secretions mix with bacteria on the skin, they can produce an unpleasant smell.
Disorders of Sweat Glands
Disorders of sweat glands can be divided into three types: excessive sweating (hyperhidrosis), reduced sweating (hypohidrosis), and absence of sweating (anhidrosis).
1. Hyperhidrosis
Hyperhidrosis is a condition in which the body produces excessive amounts of sweat. Normally, the body sweats more during intense activity, exercise, hot weather, or stress. Nevertheless, hyperhidrosis can also indicate underlying health issues such as:
- Nerve disorders
- Diabetes
- Low blood sugar
- Hormonal changes related to menopause
- Fever-related diseases such as infections or malaria
- Hyperthyroidism or overactive thyroid gland
- Side effects of certain medication
Hyperhidrosis is classified into primary and secondary types. Primary hyperhidrosis involves localized or bilateral excessive sweating, often affecting the armpits, palms, soles, face, and head, and is linked to genetic factors.
Secondary hyperhidrosis involves generalized or unilateral sweating due to underlying physiological conditions (fever, pregnancy, menopause), diseases (malignancy, infection, cardiovascular, endocrine/metabolic, neurological, or psychiatric disorders), or medication.
2. Hypohidrosis and Anhidrosis
If hyperhidrosis involves excessive sweating, hypohidrosis and anhidrosis refer to reduced or absent sweating. Anhidrosis can even be life-threatening due to hyperthermia.
Patients with these conditions often show symptoms such as dry skin (xerosis) and heat intolerance, which can lead to fatigue, weakness, dizziness, and difficulty breathing. Some conditions that may cause hypohidrosis and anhidrosis include:
- Dehydration
- Hypothyroidism (underactive thyroid)
- Burns that damage sweat glands
- Certain nerve disorders
- Prolonged heat exposure
- Exercising in hot seasons
- Certain skin conditions
That is the explanation of the various functions of sweat glands. Sweat plays an important role in the body, especially in maintaining a stable body temperature. Hence, you should engage in activities that promote sweating, such as regular exercise.
After sweating, make sure to replace lost fluids by drinking #AQUADULU every day. By staying well-hydrated, your body will remain healthy, fit, and protected from various diseases. As a high-quality mineral water, AQUA ensures its purity is maintained until it reaches you.
AQUA is also available in various packaging options, including gallon containers. One advantage of the 19-liter AQUA gallon is its affordability, costing only around IDR 1,000 per liter. Moreover, the gallon packaging is reusable, making it more environmentally friendly and reducing waste. So, keep AQUA ready to stay focused every day!
