HEAT in the middle of the night?

I get this about once a month.  I wake up completely soaked, head to toe.  My wife will wake up with me gone and my side of the bed soaked and tease me about peeing the bed.  I like to use both a sheet and a comforter regardless of the weather.  I find I just get into a deep sleep once and a while bundled in the blanket and don't wake up to adjust the blankets to cool down.

It's normal for me.  It could be correlated with being more tired from training.

For me the same symptom along with numerous other was present while I was "over reaching" in my training. It also accompanied dissruption in sleep pattern and difficulty falling asleep.

I regularly experience this the evening after a big workout. Not sure why it happens, but it certainly is nasty to wake up in a bed that feels like someone threw a bucket of water on. The benefit is that I get to fall asleep on clean sheets more often!

I do not think that this is an exercise or training related event. I have had this experience periodically all my adult life and have never found a correlation to anything.

It is rare that I need a lot of blankets (if any) and sleep better in a very cool environment. I will still get this cold sweat even in a cooler room. It never happens when I am awake too. Below is what I found in a quick search on medical sites and they all pretty much listed the same potential causes. I know I can rule almost all of this out so its still a mystery to me.

Menopause - The hot flashes that accompany the menopausal transition can occur at night and cause sweating. This is a very common cause of night sweats in perimenopausal women.
Idiopathic hyperhidrosis - Idiopathic hyperhidrosis is a condition in which the body chronically produces too much sweat without any identifiable medical cause.
Infections - Classically, tuberculosis is the infection most commonly associated with night sweats. However, bacterial infections, such as endocarditis (inflammation of the heart valves), osteomyelitis (inflammation within the bones), and abscesses all may result in night sweats. Night sweats are also a symptom of AIDS virus (HIV) infection.
Cancers - Night sweats are an early symptom of some cancers. The most common type of cancer associated with night sweats is lymphoma. However, people who have an undiagnosed cancer frequently have other symptoms as well, such as unexplained weight loss and fevers.
Medications - Taking certain medications can lead to night sweats. In cases without other physical symptoms or signs of tumor or infection, medications are often determined to be the cause of night sweats. Antidepressant medications are a common type of medication that can lead to night sweats. All types of antidepressants can cause night sweats as a side effect, with a range in incidence from 8 to 22% of persons taking antidepressant drugs. Other psychiatric drugs have also been associated with night sweats. Medicines taken to lower fever such as aspirin and acetaminophen can sometimes lead to sweating. Other types of drugs can cause flushing, which, as mentioned above, may be confused with night sweats. Some of the many drugs that can cause flushing include:
niacin (taken in the higher doses used for lipid disorders),
tamoxifen,
hydralazine,
nitroglycerine, and
sildenafil (Viagra).
Many other drugs not mentioned above, including cortisone medications such as prednisone and prednisolone, may also be associated with flushing or night sweats.

Hypoglycemia - Sometimes low blood glucose can cause sweating. People who are taking insulin or oral anti-diabetic medications may experience hypoglycemia at night that is accompanied by sweating.
Hormone disorders - Sweating or flushing can be seen with several hormone disorders, including pheochromocytoma, carcinoid syndrome, and hyperthyroidism.
Neurologic conditions - Uncommonly, neurologic conditions including autonomic dysreflexia, post-traumatic syringomyelia, stroke, and autonomic neuropathy may cause increased sweating and possibly lead to night sweats.

This is just a thought, but have you been using sunscreen more often? Some people can have a sensativity to the chemicals found in a lot of sunscreens which could cause symptoms like yours. You could try switching to a more natural barrier type of sunscreen and see if that helps.

Could be a zillion different things some of which can much more severe than over training.    I had an infected abscess that caused me night sweats for a few weeks before I figured out what it was.


From WebMd

There are many different causes of night sweats. To determine what is causing night sweats in a particular individual, a doctor must obtain a detailed medical history and order tests to decide if an underlying medical condition is responsible for the night sweats. Some of the known conditions that can cause night sweats are:

1. Menopause - The hot flashes that accompany the menopausal transition can occur at night and cause sweating. This is a very common cause of night sweats in perimenopausal women.

1. Idiopathic hyperhidrosis - Idiopathic hyperhidrosis is a condition in which the body chronically produces too much sweat without any identifiable medical cause.

1. Infections - Classically, tuberculosis is the infection most commonly associated with night sweats. However, bacterial infections, such as endocarditis (inflammation of the heart valves), osteomyelitis (inflammation within the bones), and abscesses all may result in night sweats. Night sweats are also a symptom of AIDS virus (HIV) infection.

1. Cancers - Night sweats are an early symptom of some cancers. The most common type of cancer associated with night sweats is lymphoma. However, people who have an undiagnosed cancer frequently have other symptoms as well, such as unexplained weight loss and fevers.

1. Medications - Taking certain medications can lead to night sweats. In cases without other physical symptoms or signs of tumor or infection, medications are often determined to be the cause of night sweats. Antidepressant medications are a common type of medication that can lead to night sweats. All types of antidepressants can cause night sweats as a side effect, with a range in incidence from 8 to 22% of persons taking antidepressant drugs. Other psychiatric drugs have also been associated with night sweats. Medicines taken to lower fever such as aspirin and acetaminophen can sometimes lead to sweating. Other types of drugs can cause flushing, which, as mentioned above, may be confused with night sweats. Some of the many drugs that can cause flushing include:

• niacin (taken in the higher doses used for lipid disorders),
• tamoxifen,
• hydralazine,
• nitroglycerine, and
• sildenafil (Viagra).

Many other drugs not mentioned above, including cortisone medications such as prednisone and prednisolone, may also be associated with flushing or night sweats.

1. Hypoglycemia - Sometimes low blood glucose can cause sweating. People who are taking insulin or oral anti-diabetic medications may experience hypoglycemia at night that is accompanied by sweating.

1. Hormone disorders - Sweating or flushing can be seen with several hormone disorders, including pheochromocytoma, carcinoid syndrome, and hyperthyroidism.

1. Neurologic conditions - Uncommonly, neurologic conditions including autonomic dysreflexia, post-traumatic syringomyelia, stroke, and autonomic neuropathy may cause increased sweating and possibly lead to night sweats.

While not to the extent that you seem to be having it, I too have gone from the cold one in bed to sweating profusely since I started my training.  I always slept with a blanket, at least, and lately I've been sleeping on top of the sheets.  Even my fiancee has made some comments and teased me about my sudden change in internal thermostat.

Now I'm pissed!  I don't want to be the first dude ever to go through Menopause.

Even in winter when it's freezing this sometimes happens to me.

I have to take most of my clothes off and a few blankets.

LMAO.

No need to worry, I'm right there with you. Happens to me on a regular basis.

FishHog

It happens to me when I'm not properly hydrated. Try drinking a glass of water when you wake up sweating and see if it helps.

It's a fine line between drinking too much water before going to bed and waking up to go pee and not drinking enough and waking up to drink more.

Hmmm, very possible there.  I've had a problem staying hydrated lately.  (according to the cramping)  I've been trying to drink a lot but I may need to move away from just water and mix in some sports drinks.  I've been considering buying Cytomax or just getting a case of G2 at SAMs Club this weekend.  I'll search around for what you folks recommend.

This could also be a symptom of sleep apnea. Ask you spouse if you seem to stop breathing from time to time during the night. Often accompanied with snoring. Allergies will also affect your breathing which can exacerbate the condition.

Very interesting. I woke up this morning sweating. Like others have said above... and I got on the scale and I was down 3 pounds. I felt like I drank enough water yesterday, but I didn't drink that much water during/after riding 22 miles and running 2 miles in 90 degree heat.

So maybe I was dehydrated... thus the sweating during the night?

Yes, that's why I thought it might apply. The OP said he recently upped training.

If you get tired of plain water but don't need all the calories in a full sports drink just top off your water with a bit of apple juice, like 10% or so. It gives it water some flavor but only marginal calories. (I prefer to get those through food instead, except during training sessions... or when I have a beer...)

I would encourage you to try acupuncture. I have dealt with the same problem, and found it to work great for that, and many other things. If I am getting regular acupuncture, no night sweats!

Get a recommendation (if you can) of an acupuncturist in your area. Not all are created equal!