Why is my 87 year old mother so tired?

Understanding Fatigue in the Elderly

Fatigue in older adults often stems from various factors, including medical treatments like radiation therapy or chemotherapy. Additionally, issues such as untreated pain, recovery from surgical procedures, and chronic health conditions—including heart disease, kidney disease, diabetes, liver or thyroid disorders, and chronic obstructive pulmonary disease (COPD)—can also contribute to feelings of tiredness.