Lethargy is a decrease in consciousness. It happens because of disruptions in brain activity. It’s a possible symptom of serious medical conditions.

Dec 6, 2025 · Lethargy causes a lack of energy and drowsiness beyond normal tiredness. It may improve with rest or be a sign of an underlying condition. How Can You Tell if You're …

Lethargy is a state of tiredness, sleepiness, weariness, fatigue, sluggishness, or lack of energy. It can be accompanied by depression, decreased motivation, or apathy.

Dec 25, 2025 · Lethargy is a state of physical or mental fatigue. Learn more about the symptoms of lethargy, what can cause them, and how underlying issues are treated.

Mar 31, 2025 · Lethargy is a lack of energy and mental alertness. Many lifestyle habits and health conditions cause lethargy. Learn about lethargy causes and when to get help.

Feb 4, 2026 · This article explores the causes and characteristics of lethargy, as well some steps that can help you diagnose and treat its underlying causes.

Aug 28, 2020 · Lethargy refers to a sense of fatigue and a lack of both mental and physical energy and motivation. A person with lethargy may feel unmotivated or have an indifferent …

Aug 2, 2019 · Lethargy is a state of fatigue or sluggishness. Learn about the variety of conditions that may cause it, and when it may signal a medical emergency.

Aug 15, 2025 · Lethargy is marked by a lack of energy and motivation, making everyday tasks difficult and often impacting both physical and mental health. Symptoms of lethargy include …

lethargy, in medicine, a morbid condition of deep and lasting drowsiness from which the sufferer can be aroused only with difficulty and temporarily. It is a symptom of various disorders, such …