Weakness, otherwise called asthenia, is the decline in muscle strength and feeling of tiredness. People usually experience a lack of energy due to flu, anemia, depression, sleep deprivation, uncontrolled diabetes, vitamin deficiency, cancer, and muscle injuries.
Fatigue - An Overview
Fatigue is a state of constant and extreme exhaustion, tiredness, or weakness; and can be caused due to various reasons. Read the article to know more.
