Not all chest pain means a heart attack. Women commonly describe their chest symptoms as tightness, fullness, burning, heaviness or pressure â NOT pain. See also: 85% of hospital admissions for chest pain are NOT heart attack. 3. Cough: persistent coughing or wheezing can be a symptom of heart failure.
Warmers operate on a chemical reaction with air similar to rusting. The warmer ingredients are iron, water, cellulose, vermiculite, activated carbon and salt. The heating process takes place in this fashion: The iron in the pouch, when exposed to oxygen, oxidizes and therefore produces heat (aka, Air Activated).
When you toss the hand warmer lid back on, just keep in mind that it does take a good 10-15 minutes before it reaches maximum burn, so be sure to allow it to get plenty of air for awhile before dropping it in a pocket. Also note that it does need oxygen to function. If you smother the hand warmer and it canât get air it will go out. The protective fabric bag you drop the heater into is necessary to prevent burns, as they do get pretty hot and are made of metal.