the reason that you are having skin burn when you sweat is because there are fats and toxins in your body that is not needed so when you workout you sweat and that is when your body gets rid of the fats that your body does not need which can cause obesity and death. your skin is burning so that it can get rid of the toxins in your body that can make you sick so be sure to take a good shower. and also make sure that your hair is properly washed. if it is not then the toxins in the sweat can damage your scalp and form hair dandruff.
why does my skin burn when i sweat? . worse under the arms but a burning sensation like sunburn everywhere.