https://www.verywellhealth.com/the-journey-towards-death-1132504
Days to Hours Prior to Death
Sometimes, the last couple of days before death can surprise family members. Your loved one may have a sudden surge of energy as they get closer to death. They want to get out of bed, talk to loved ones, or eat food after days of no appetite.
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The surge of energy is usually short, and the previous signs return in stronger form as death nears. Breathing becomes more irregular and often slower. Cheyne-Stokes breathing, rapid breaths followed by periods of no breathing at all, may occur. So may a loud rattle.