Stress causes the release of a hormone called cortisol. Giving rats daily injections of corticosterone (rat cortisol) for several weeks kills certain brain cells. Stressing the rats each day for the same amount of time has an identical effect.
As soon as possible after the burn or scald, ideally within 20 minutes, cool the area of the burn using cool or lukewarm water for 10 minutes to half an hour. Do not use ice, ice water, creams, greases or butter, which can cause further damage. Butter and oils actually retain heat rather than helping to remove it.
Medically Recommended Method for Healing Bruises. 1  1. Apply ice to the bruise. 2  2. Use an ice-pack, a bag of ice, or a package of frozen vegetables, such as frozen peas. 3  3. Ice the bruise for no more than 15 minutes per hour.  4. After 24 hours, apply heat to the 1  bruise. 5. Use a warm compress or a hot water bottle.  6. Apply heat for at least an hour.