Melissa: I agree with the sweating as it also helps to cool the body down (that IS the main function of sweating after all). What I don't understand is why some people flush while exercising and others don't. Perhaps our heat-exchange systems don't use the sweating mechanism effectively so we overheat more? Or our cellular metabolism somehow generates more heat than non-flushers? It is an interesting dilemma. I know for sure that some non-rosaceans do flush while exercising and it is relatively common. Therefore, I would say that for anyone here who is flushing from exercise, don't let it bother you too much! However, just take steps to minimize the flush if possible while exercising, and if you do end up flushing, just try to cool down as quickly as you can with the method I mentioned above or something else that works for you. The body is doing what it's supposed to be doing since you will die if your core temperature gets too high. Just like we put fans in our computers to cool them down so they don't overheat, flushing is one mechanism the body uses to flush out excess heat from our systems since we have lots of blood vessels close to the surface of the skin on our faces.
The problem is that some people's flushes are prolonged and take forever to go away and that's when you need to help the body cool down faster since I don't believe it's good to allow the vessels to stay open for a long time. This might train them to permanently dilate, I'm not sure. However, it is a lot more comfortable and visually appealing not to be flushing so I'm all for helping the body cool down as quickly as possible.


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