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I almost passed out and dont know why (??)

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I almost passed out and dont know why (??)

Old 12-18-17, 08:23 AM
  #1  
anaclaudia
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I almost passed out and dont know why (??)

Okay, so yesterday I went cycling with my friend, and in the day before i had a couple drinks, but not much (idk if it is relevant). Anyways, I was kind of tired, but not exausted, I felt fine, just a little tired, but then my friend pulled over because his bike had a problem, and only when we stopped I started feeling really heavy, I couldnt hear almost anything and my vision got really dark, then I said "hey dude, can you get me water? im not really feeling fine", he went to buy me a bottle and I sat on the floor. As I sat it only got worse, and I think it is important to say that I live in Brazil, and its really hot in here, so I went for a shade and at that point I was SURE I was going to pass out. Then some guards showed up, and a dude offered me water. When my friend got there I was surrounded by people and I already felt realy better, then we walked our bikes to a restaurant where I ate and waited a little until we got back.
Anyways, i dont know what happened, if it was because of the sun and the heat, if it was because I was dehydrated or if it was some kind of hypoglicemia crisis (im not diabetic by the way), so I was hoping to find someone who went through something similar or knew what it was to explain it to me.
Sorry for the long topic and for any grammar mistakes, im not a native speaker.
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Old 12-18-17, 08:33 AM
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Maybe a combination of things caused it, water, heat and exercise. If it happens again soon, go see a doctor. Nobody can really help you with physical issues like this online.
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Old 12-18-17, 08:35 AM
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Your English is better than most Americans, who are the most likely to respond to your post, so there is no need to apologize. It sounds like you probably had a bit of a heat stroke. Dehydration, which can be a result of drinking alcohol, combined with exertion and heat, can cause some of the symptoms you described. You should see a doctor, and make sure there is nothing else that you need to worry about. We can't know your medical history, age, fitness level, or experience, so it's not really helpful to try to diagnose your case, but it sounds like you need to get hydrated, and take it easy in the heat, for a while. Talk to your doctor, and explain what happened.

Maybe you're pregnant! I know I'd pass out, if I were! Merry Christmas!
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Old 12-18-17, 08:42 AM
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The internet is not a great place for medical advice, but it sounds like a scary experience. It is something you should talk over with your doctor. It really could be anything from a one time combination of heat and dehydration, to a more serious problem that needs to be looked into.
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Old 12-18-17, 09:00 AM
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Welcome to Bike Forums, anaclaudia! What we call that up here is that you "bonked". Riding in hot weather, you need extra water and food and take more breaks. Nothing serious, but see a doctor any way to make sure there are no issues you do not know about. Please report back often!!!!
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Old 12-18-17, 09:03 AM
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possible heat stroke. glad you are feeling better
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Old 12-18-17, 09:10 AM
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I have had things like this happen before from dehydration - both feeling "off" and on one occasion, actually passing out. Hot and humid weather can definitely put some stress on the body - and if you started the day off a bit dehydrated (perhaps from drinks the day before) that can only make it worse.

Check the Training and Nutrition subforum for some threads about staying properly hydrated. Replacing electrolytes is important especially in hot/humid weather, and you want to avoid both dehydration and overhydration (which can be dangerous.)

If it's a one-time incident, I wouldn't worry too much. If it keeps happening: doctor.
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Old 12-18-17, 10:22 AM
  #8  
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Just agreeing with everyone---I'm just that kind. Particularly after drinking alcohol, which tends to dehydrate the body, and always when riding in hot weather, Drink Lots and pay attention to your body.

When I lived in Central Florida (not Brazil, but it does get hot and humid) I had similar experiences on a few occasions. I wouldn't worry about a health issue, but I would learn from this and prepare better.

Welcome to BF, and Keep enjoying the ride!
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Old 12-18-17, 10:40 AM
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Felix Natal Anaclaudia. And Merry Christmas also.
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Old 12-18-17, 11:16 AM
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Sounds like a bonk, with heat exhaustion. I've only felt something similar right after stopping, when it's really hot and I'm riding without water. When you're riding, the breeze tends to cool you but then you stop and it hits you all at once.
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Old 12-18-17, 12:21 PM
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Alcohol both dehydrates you and causes your blood sugar to drop. Maybe you hadn't fully rehydrated and gotten sufficient glucose back.

One time combined with the alcohol, no biggie. If it repeats then see a doctor.
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Old 12-18-17, 12:53 PM
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Originally Posted by BikeLite View Post
Maybe a combination of things caused it, water, heat and exercise.
^^ That would be my guess as well..
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Old 12-18-17, 03:42 PM
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This is Bike Forums, not Doctor Forums. The symptoms you've described very closely resemble a brief hypotensive state. Many here will call it "bonking," but without knowing you, your medical history or current physical condition, anything you read here (including my response) is wholly inadequate.

Schedule an appointment with a trained professional immediately. Let them perform a routine workup based on your symptoms and experiences. What happened my very well be benign, or it could be an indication of something serious. Only an adequate evaluation will provide the best, safest answer.

-Kedosto
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Old 12-18-17, 07:16 PM
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anaclaudia
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Originally Posted by BikeLite View Post
Maybe a combination of things caused it, water, heat and exercise. If it happens again soon, go see a doctor. Nobody can really help you with physical issues like this online.
yeah i know, i will schedule an appointment in january, but thanks anyways
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Old 12-18-17, 07:18 PM
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anaclaudia
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Originally Posted by kevindsingleton View Post
Your English is better than most Americans, who are the most likely to respond to your post, so there is no need to apologize. It sounds like you probably had a bit of a heat stroke. Dehydration, which can be a result of drinking alcohol, combined with exertion and heat, can cause some of the symptoms you described. You should see a doctor, and make sure there is nothing else that you need to worry about. We can't know your medical history, age, fitness level, or experience, so it's not really helpful to try to diagnose your case, but it sounds like you need to get hydrated, and take it easy in the heat, for a while. Talk to your doctor, and explain what happened.

Maybe you're pregnant! I know I'd pass out, if I were! Merry Christmas!
Thank you I'll probably see a doctor next year, but im pretty sure im not pregnant hahah. Merry Christmas!
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Old 12-18-17, 07:20 PM
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Originally Posted by jefnvk View Post
The internet is not a great place for medical advice, but it sounds like a scary experience. It is something you should talk over with your doctor. It really could be anything from a one time combination of heat and dehydration, to a more serious problem that needs to be looked into.
Yes, of course. I came here only because I was really scared, but I also talked with my family and im going to the doctor soon to make sure everything is fine. thanks anyways
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Old 12-18-17, 07:21 PM
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Originally Posted by FBOATSB View Post
Welcome to Bike Forums, anaclaudia! What we call that up here is that you "bonked". Riding in hot weather, you need extra water and food and take more breaks. Nothing serious, but see a doctor any way to make sure there are no issues you do not know about. Please report back often!!!!
Thanks! Im seeing a doctor soon
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Old 12-18-17, 07:28 PM
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Originally Posted by Kedosto View Post
This is Bike Forums, not Doctor Forums.
Since this is brought up on any similar thread on any forum, just remember there's a reason support groups are popular and a reason doctors urge you to join one. Sometimes it's nice to hear that what you are experiencing is normal, sometimes it's needed to hear things aren't typical to something, and sometimes you learn stuff from someone else in similar circumstances that a medical professional doesn't talk about.
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Old 12-18-17, 08:50 PM
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Originally Posted by Kedosto View Post
This is Bike Forums, not Doctor Forums. The symptoms you've described very closely resemble a brief hypotensive state. Many here will call it "bonking," but without knowing you, your medical history or current physical condition, anything you read here (including my response) is wholly inadequate.

Schedule an appointment with a trained professional immediately. Let them perform a routine workup based on your symptoms and experiences. What happened my very well be benign, or it could be an indication of something serious. Only an adequate evaluation will provide the best, safest answer.

-Kedosto
The first sentence is key. People are very different, and so anyone else telling you "yes, yes, that's exactly what happened to me!" is likely not giving you information that applies to you. Idiopathic (meaning "of unknown cause") syncope (passing out) can reflect anything from dehydration to much more serious conditions. Idiopathic syncope in an otherwise young, healthy person is definitely the universe telling you to see a trained physician.

Last edited by WizardOfBoz; 12-18-17 at 08:55 PM.
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Old 12-18-17, 09:05 PM
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Originally Posted by anaclaudia View Post
Okay, so yesterday I went cycling with my friend, and in the day before i had a couple drinks, but not much (idk if it is relevant). Anyways, I was kind of tired, but not exausted, I felt fine, just a little tired, but then my friend pulled over because his bike had a problem, and only when we stopped I started feeling really heavy, I couldnt hear almost anything and my vision got really dark, then I said "hey dude, can you get me water? im not really feeling fine", he went to buy me a bottle and I sat on the floor. As I sat it only got worse, and I think it is important to say that I live in Brazil, and its really hot in here, so I went for a shade and at that point I was SURE I was going to pass out. Then some guards showed up, and a dude offered me water. When my friend got there I was surrounded by people and I already felt realy better, then we walked our bikes to a restaurant where I ate and waited a little until we got back.
Anyways, i dont know what happened, if it was because of the sun and the heat, if it was because I was dehydrated or if it was some kind of hypoglicemia crisis (im not diabetic by the way), so I was hoping to find someone who went through something similar or knew what it was to explain it to me.
Sorry for the long topic and for any grammar mistakes, im not a native speaker.
I did the exact same thing here in Yucatan last summer. I'm almost certain it was dehydration. In my case though, I lost more than an hour that I can't remember, and sustained a concussion during that lost time. I'm told I dismounted under control, and then had trouble moving around. The concussion resulted from a fall. It was an especially hot and humid evening.
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Old 12-18-17, 09:28 PM
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Syncope or fainting (or almost fainting) can be caused by a variety of things. Without testing, it's impossible to be sure of the specific cause of your episode. Even then, the cause is very often never discovered.

A close friend in her mid-60's had an episode about a year ago with symptoms that sound similar to yours. She had extensive medical testing that focused on two key things: her heart and her nervous system. The doctors wanted to rule out things like heart arrythmias and other circulatory problems and some type of neurological problem or a tumor in the brain. She had none of these conditions and they never found anything. She was told that the cause of most syncope episodes is never found. She has not had another episode. Where I live, the law requires you to stop driving a car for six months after you've had a syncope episode.

Of course, as you and others have said, this could have been triggered by dehydration or heat stress or something closely associated with your bike riding. Perhaps when you went from a sitting position to a standing position, there was less blood flow to your brain. Drinking more fluids and riding during a cooler part of the day might be worth considering. Good luck!
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Old 12-18-17, 09:39 PM
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I had a very similar experience. Hot out did a ride that really pushed me hard on the last climb wasn't feeling to good at the top. Heading down the hill cramping really bad. Finished up the ride didn't start feeling right for a couple hours. Never happened before and hasn't happened since.
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Old 12-18-17, 11:35 PM
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Originally Posted by anaclaudia View Post
I started feeling really heavy, I couldnt hear almost anything and my vision got really dark
I had this happen to me as well. It was a really hot day and I had been walking a lot in Washington D.C. going to monuments & museums. Once I got into the Holocaust museum I started feeling horrible, hearing nearly gone & everything was getting dark (like a tunnel, darkness closing inwards). I fell against the wall and slid down but was only out for maybe a minute, if that. Figured it was from not eating yet that day, and possible dehydration.
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Old 12-19-17, 09:12 AM
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As a retired health professional, I'm reluctant to offer a diagnosis based on the limited information available, but dehydration would certainly be high on the differential list.
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Old 12-20-17, 05:24 AM
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AGE ? ... WEIGHT ?... PRIOR MED HISTORY ? >>> MEDS/blod pressure med ! ? ...etc all ops are guesses without better history
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