What Can Cause Excessive Sweating? 2 Causes That Make You Sweat Excessively

Have you been caught by surprise that your armpits suddenly started sweating more than you ever experienced? There are certain triggers that can cause excessive sweating.

Back when I was in my early teens I realized that I would start to sweat as I had never before. It is known that the apocrine sweat glands only develop with puberty kicking in and the sweat glands start to produce a different sweat than was normal in your childhood.

Causes of excessive sweating
Sweating isn’t just caused by exercise, sometimes your body sweats suddenly, and you have to know why.
Photo by Max Winkler on Unsplash

You’re not alone in dealing with sweat-related problems. I have been managing and dealing with hyperhidrosis for over 2 decades now so I do know how hard it is. Read my story here.

I was completely caught by surprise one evening and from there on, I couldn’t stop sweating anymore. This was a frustrating experience. It is in your teens that peer pressure is tough on you.  It is the period when you need the other’s approval and it is also that time when everything seems to go against you.

All you want is to be cool, to be accepted and have no flaws. Having huge sweat stains under my arms that left my clothes drenched was not exactly what I would describe as a pleasurable experience.

Thoughts often crossed my mind about being rejected, not being accepted, not pertaining to a clique. What would everybody think of me? Also, the bad smell of excessive sweating was an issue and I could not help but start to take 2+ showers daily. What could I do? I needed to change clothes frequently.

Finding the correct deodorant was a problem during that time. Never had I heard about antiperspirant nor active ingredients that could stop excessive sweating. Another problem that I had was irritated skin by most of the deodorants that I tried. I would buy different ones often just to find out that after 2 or 3 days of applying them, my armpits would get a bad rash, which would make me want to hold my arms up the whole day.

After time passed, I learned more about excessive sweating and found great solutions. In this article, I will describe two main causes of excessive sweating and tell you about my recommendations.

Understanding Hyperhidrosis

Have you heard the term hyperhidrosis? Hyperhidrosis is the medical term for excessive sweating. There are two types of hyperhidrosis: Primary and secondary hyperhidrosis.

Hyperhidrosis is when you sweat excessively. When you go to the gym to do your routine of workout, you will sweat. There is no doubt that working outside in the hot sun in your garden will make your sweat run along your forehead and down the nose. Also, when it is really hot in a room, there is a reason to sweat, but there are people that sweat more than the required amount.

Sweating was designed in your body as a coolant. When your body gets too hot, your sweat glands start producing sweat to maintain the body temperature. When our body becomes too hot and we don’t sweat, it becomes dangerous for our vital organs.

People that sweat excessively usually sweat when watching TV, sitting on the computer, driving the car, etc. I often have the air condition on high in my vehicle, but I still sweat very much. You see, hyperhidrosis refers to people that are sweating beyond normal in situations when you should not be sweating.

These are the 2 causes for this embarrassing problem that kicks people off guard and makes them wonder how they could disappear magically in the middle of a presentation. Let’s look a little at each one of these causes in detail.

Secondary Hyperhidrosis

Why would I start to describe this one first? If you are an adult and have never had the problem to sweat excessively and suddenly you sweat more than you thought could be possible, there are chances that you are suffering from secondary hyperhidrosis.

Secondary hyperhidrosis is triggered by many medical conditions that cause a hormonal imbalance. It also causes you to sweat abnormally all over your body, for example, sweating excessively on your back, your belly, legs, etc. Under normal circumstances, we tend to sweat more on our neck, armpits, feet, hands, and so on.

If you recently started to sweat more than you did before, you might have a serious disease or condition that could cause this problem.

There is a number of reasons for secondary hyperhidrosis, in which case you should get advice from your doctor.

Following is a number of causes that can trigger secondary hyperhidrosis.


The good thing about pregnancy is that it is not a serious condition, but a joyous occasion, in which sweating is just a nasty side effect. However, it is true that many women sweat much more when pregnant than they would under normal circumstances when not pregnant.

My wife is a perfect example of it. She finally understood how annoying sweating can be. She had seen it on me and she never thought it could be so bad. When she was pregnant with our boys, she sweated much more. Never did I think she would understand how uncomfortable wet clothes due to sweating can be. Nevertheless, this problem ceased immediately after she gave birth to our babies.

What happens during pregnancy that causes you to sweat excessively?

Expecting women start to sweat more in the second trimester. The little baby inside the womb is “cooking” and is perfectly comfortable with your body temperature. However, you will feel the heat more than ever because your body is doing much more during these months than it has ever before. Your sweat reflex thinks that your body needs to cool off and the sweat glands work incessantly.

Also, we cannot forget the raging pregnancy hormones that are wild during this time. The hormonal imbalance in your body is very obvious, as things are changing rapidly. There is a huge change coming with the arrival of the bundle of joy. That alone keeps your hormones upside down, plus all the changes that your body is facing.

If you are expecting, excessive sweating is absolutely normal. However, consider staying more hydrated and staying away from the burning sun for extended times. Keep temperatures regulated as much as possible to not expose your body to radical changes.

Other than that, you need not to be worried about excessive sweating.

Heart Disease

Excessive sweating is a good sign that a heart attack is underway. If you have never experienced excessive sweating, and you suddenly start to feel dizzy, chest pain, arm pain, shortness of breath, accompanied by excessive sweating, you should seek medical help immediately.

Studies have not been able to conclude if the amount of sweating has anything to do with the seriousness of heart attacks.

Secondary hyperhidrosis (often referred to as generalized hyperhidrosis) and heart disease are closely linked to each other. When your heart has a tough time pumping blood around and keeping the body alive, it will make much more effort and work harder than ever to make things work.

Whenever your body is under stress and working hard, your body temperature goes up and that signals your sweat glands to keep the body at regular temperature.

If you have experienced excessive sweating lately and you are not so sure what it is about, why not go to see your doctor immediately and rule out heart disease. Excessive sweating is triggered by many things and it could very well be that you are having a heart condition that you didn’t know of before and get medical attention.

Moreover, if you know that you have heart disease, excessive sweating should be your sign to go to the hospital without waiting for it to go over. Serious damage can be prevented if treated in time.

Obesity and Diabetes

People that are obese commonly sweat more than people that have their recommended weight. Obese people tend to eat more fatty, processed foods rather than fresh, raw and whole food, like fruits and vegetables. Fatty foods tend to lack fibers and enzymes that help digest foods.

When these foods enter the digestive tracts, the body is being stressed because it is harder to absorb the nutrients from the ingested foods. Your body temperature rises because it takes twice as long to process these foods than vegetables and fruits.

In fact, there are foods, for example, spicy foods, that can reduce excessive sweating, but also foods that can trigger it more.

When your body temperature rises, your sweat glands are told to get to work because body temperature is too high. Therefore, obese people tend to sweat excessively.

Change your eating habits and lifestyle and excessive sweating should go away if the trigger of your sweating is secondary hyperhidrosis.

Because obesity and diabetes are closely linked to each other, we can assume that people with diabetes that are obese also are known to sweat excessively.

If your sweating problem kicked in when starting to gain excess weight, you can be quite sure that the cause is obesity. I was already overweight when going into my teenage years, which is exactly when I started to sweat excessively.

However, I have lost over 40 pounds recently and I continue to sweat excessively. Although it has decreased a little more, in my case the condition is primary hyperhidrosis, which I am going to address in a moment.

Losing weight, changing the foods you eat for whole and fresh food, can and will make a change over time.


Who doesn’t know that? Yes, fever can cause you to sweat excessively and at the same time make you feel chilly and cold.

Children and adults all can suffer from excessive sweating when having a fever. Fever is the body’s mechanism to raise the temperature of the body to kill the virus and bacteria that are invading territory. A raised temperature triggers the sweat glands to cool down.

This is another of the non-dangerous causes of excessive sweating. Be advised that you should seek medical help if things are going out of control, especially in little children when they start to appear listless, when fever stays for 3 days or more, or when the body temperature gets too high.

In adults, when fever is accompanied by chest pains, arm pains, shortness of breath and other symptoms, you should seek medical help immediately.


Hyperthyroidism is when your thyroid is overactive and produces too much thyroxine. An overactive thyroid can speed up your metabolism quickly and have you lose weight unexpectedly, trigger your nervous system, cause irritability, increase your heartbeat or make an irregular heartbeat.

People that suffer from hyperthyroidism can surely experience excessive sweating since there is an imbalance in your hormonal system that can take a negative effect on the sweat glands.

Hyperthyroidism is often treated with medication and sometimes with the complete or partial removal of the thyroids through surgery.

The problem with hyperthyroidism is that it often mimics other health issues that make it difficult to identify the real problem. Excessive sweating can sometimes look like primary hyperhidrosis when it really is a generalized (secondary) sweating problem that is due to the thyroids.

Again, if you started sweating excessively later on in adulthood, be sure to check out if your thyroids are working properly.

Other Causes

There are a number of other medical causes that can suddenly make you sweat excessively. Don’t wait until you seek medical help and find out what the reason behind your sweating is.

Here are other well-known causes of generalized sweating (the list is not exclusive):

  1. Parkinson’s disease
  2. Leukemia
  3. Certain tumors
  4. Malaria
  5. Menopause
  6. Anxiety disorders
  7. Diabetic hypoglycemia
  8. Tuberculosis
  9. Medications

Primary Hyperhidrosis

As I said before, there are two types of hyperhidrosis, namely secondary an primary.  I am going to talk about primary hyperhidrosis, which is one of the reasons that people sweat excessively, in this section.

In your early teens, when your hormones start to change, you can develop what is known as primary hyperhidrosis. However, it can also start in early adulthood, but will not start when as you get older, or in early childhood.

Primary hyperhidrosis is when you sweat for no obvious reason and for no health reason. Sweat glands just don’t know when to stop producing sweat. Primary hyperhidrosis, also known as focal hyperhidrosis is when you sweat excessively on your scalp, face, feet, hands, groin, and underarms, and not necessarily on arms, legs, belly, etc.

Physicians claim that primary hyperhidrosis is due to the overactivity of the sympathetic nervous system. What happens often is that you get nervous about your sweating and therefore sweat even more. Being nervous triggers the sweat glands and you start to sweat more than you usually would.

For example, you have a date planned for the night. The first thing that crosses your mind is your sweaty clothes and how you will be sweating again. Those thoughts stress you and make you nervous about the dinner and off you start to sweat. As you sweat, you are still nervous because you are the dilemma of what you should do now. That produces more sweat.

Only 4%-5% of the population have primary hyperhidrosis. The number could be slightly higher because many people don’t think of excessive sweating as a medical condition, which can be treated.

Is There A Cure Or Treatment For Hyperhidrosis?

Secondary hyperhidrosis will go away if the trigger is found in time and things can be taken into control. However, primary hyperhidrosis is a condition that has no “cure”, yet there are treatments that made to reduce profuse sweating, and in some cases even cure it completely.

I have found solutions to my armpit sweating problem, which do not cost very much but are highly effective. After using them for well over a year, I can testify that they really work and that you feel much better about yourself again.  Read more about my solutions below.

You regain your confidence and can start to do your daily routines in a much better way than you can without them.


I’m glad you stopped by and read everything above. My goal is to give everyone information and facts about sweating so they can manage this condition like I have. Now you know the 2 major causes of sweating, you can probably identify what you have been experiencing.

If you found the information helpful that I provided, don’t forget to share with your friends that are suffering by clicking on the social media links. Also, if you have any questions, comments, or thoughts, please leave them in the box below and I am happy to interact with you.


Ready to Make a Change Now?

My name is Oscar and I am the founder and director of Stop-Sweating-Now.com and have been researching and writing about hyperhidrosis for many yearOscars.

I have been sweating excessively for the better part of my life.  I looked for solutions for well over a decade, but I never found anything that lasted.

It all started when I was around 14 years of age, when I suddenly found out that I was sweating more in my armpits than I should.  At first I thought it was something that would go away soon, but I was wrong.

I had given up hope and accepted to live the rest of my life being embarrassed with ugly sweat stains in my armpits.

However, after a few years of not searching for any solutions anymore, I gave it another shot.  And I found what finally gave me the freedom I had longed for so many years. 

After finding a solution to my problem, I decided it was important to shout out my message to those that are suffering from what I had lived with so many years.

My goal is to help people find their freedom from sweating by sharing my expertise because hyperhidrosis is an underdiagnosed condition.

People don’t know that it is a medical term and can be treated effectively.

That is why I am here: Sharing with you what I know, what works and what does not work.

Want to learn more about what I did? Click below!

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